./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i -s /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f2570563cfcd810b6ed16bb44bfedbab29cf846e ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i -s /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f2570563cfcd810b6ed16bb44bfedbab29cf846e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:24:50,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:24:50,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:24:50,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:24:50,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:24:50,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:24:50,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:24:50,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:24:50,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:24:50,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:24:50,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:24:50,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:24:50,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:24:50,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:24:50,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:24:50,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:24:50,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:24:50,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:24:50,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:24:50,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:24:50,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:24:50,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:24:50,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:24:50,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:24:50,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:24:50,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:24:50,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:24:50,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:24:50,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:24:50,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:24:50,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:24:50,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:24:50,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:24:50,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:24:50,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:24:50,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:24:50,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:24:50,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:24:50,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:24:50,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:24:50,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:24:50,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:24:50,619 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:24:50,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:24:50,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:24:50,621 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:24:50,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:24:50,621 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:24:50,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:24:50,622 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:24:50,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:24:50,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:24:50,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:24:50,623 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:24:50,623 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:24:50,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:24:50,623 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:24:50,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:24:50,624 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:24:50,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:24:50,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:24:50,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:24:50,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:24:50,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:24:50,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:24:50,626 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:24:50,626 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:24:50,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:24:50,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:24:50,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:24:50,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:24:50,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:24:50,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:24:50,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:24:50,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:24:50,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:24:50,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:24:50,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:24:50,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:24:50,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:24:50,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:24:50,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:24:50,630 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2570563cfcd810b6ed16bb44bfedbab29cf846e [2020-11-30 02:24:50,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:24:50,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:24:50,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:24:50,942 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:24:50,943 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:24:50,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2020-11-30 02:24:51,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/b4a3b3d5c/b7dd2b2cd1aa4b07ae578b3b1964296f/FLAG6c9851732 [2020-11-30 02:24:51,425 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:24:51,425 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2020-11-30 02:24:51,432 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/b4a3b3d5c/b7dd2b2cd1aa4b07ae578b3b1964296f/FLAG6c9851732 [2020-11-30 02:24:51,828 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/b4a3b3d5c/b7dd2b2cd1aa4b07ae578b3b1964296f [2020-11-30 02:24:51,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:24:51,831 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:24:51,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:24:51,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:24:51,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:24:51,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:24:51" (1/1) ... [2020-11-30 02:24:51,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c7bc056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:51, skipping insertion in model container [2020-11-30 02:24:51,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:24:51" (1/1) ... [2020-11-30 02:24:51,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:24:51,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:24:52,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:24:52,068 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:24:52,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:24:52,103 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:24:52,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52 WrapperNode [2020-11-30 02:24:52,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:24:52,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:24:52,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:24:52,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:24:52,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:24:52,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:24:52,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:24:52,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:24:52,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... [2020-11-30 02:24:52,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:24:52,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:24:52,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:24:52,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:24:52,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/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 [2020-11-30 02:24:52,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:24:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:24:52,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:24:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:24:52,759 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:24:52,760 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-30 02:24:52,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:52 BoogieIcfgContainer [2020-11-30 02:24:52,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:24:52,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:24:52,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:24:52,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:24:52,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:24:51" (1/3) ... [2020-11-30 02:24:52,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da8a3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:24:52, skipping insertion in model container [2020-11-30 02:24:52,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:52" (2/3) ... [2020-11-30 02:24:52,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da8a3fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:24:52, skipping insertion in model container [2020-11-30 02:24:52,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:52" (3/3) ... [2020-11-30 02:24:52,775 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2020-11-30 02:24:52,791 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:24:52,796 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 02:24:52,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 02:24:52,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:24:52,831 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:24:52,831 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:24:52,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:24:52,831 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:24:52,831 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:24:52,832 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:24:52,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:24:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-30 02:24:52,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:24:52,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:52,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:52,851 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1336728302, now seen corresponding path program 1 times [2020-11-30 02:24:52,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:52,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734297167] [2020-11-30 02:24:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734297167] [2020-11-30 02:24:53,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:53,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:24:53,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546932187] [2020-11-30 02:24:53,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:24:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:24:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:24:53,032 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-11-30 02:24:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:53,047 INFO L93 Difference]: Finished difference Result 32 states and 47 transitions. [2020-11-30 02:24:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:24:53,049 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-30 02:24:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:53,057 INFO L225 Difference]: With dead ends: 32 [2020-11-30 02:24:53,057 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 02:24:53,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:24:53,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 02:24:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-30 02:24:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 02:24:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-11-30 02:24:53,092 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 7 [2020-11-30 02:24:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:53,093 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-11-30 02:24:53,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:24:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-11-30 02:24:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:24:53,094 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:53,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:53,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:24:53,095 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:53,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash -956121442, now seen corresponding path program 1 times [2020-11-30 02:24:53,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:53,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211831519] [2020-11-30 02:24:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:53,115 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:53,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053358010] [2020-11-30 02:24:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:24:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:53,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:53,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211831519] [2020-11-30 02:24:53,283 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:53,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053358010] [2020-11-30 02:24:53,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:53,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:24:53,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693497130] [2020-11-30 02:24:53,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:24:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:24:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:24:53,286 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 6 states. [2020-11-30 02:24:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:53,374 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-11-30 02:24:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:24:53,375 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-30 02:24:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:53,376 INFO L225 Difference]: With dead ends: 34 [2020-11-30 02:24:53,376 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 02:24:53,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:24:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 02:24:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-11-30 02:24:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 02:24:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-11-30 02:24:53,384 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2020-11-30 02:24:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:53,385 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-11-30 02:24:53,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:24:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-11-30 02:24:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:24:53,391 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:53,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:53,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 02:24:53,598 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1936052027, now seen corresponding path program 1 times [2020-11-30 02:24:53,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:53,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395690363] [2020-11-30 02:24:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:53,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:53,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556250396] [2020-11-30 02:24:53,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:53,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:24:53,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:53,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:53,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:25:04,401 WARN L193 SmtUtils]: Spent 10.37 s on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:25:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:04,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395690363] [2020-11-30 02:25:04,405 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:04,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556250396] [2020-11-30 02:25:04,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:25:04,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:25:04,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401702834] [2020-11-30 02:25:04,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:25:04,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:04,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:25:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:25:04,409 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-11-30 02:25:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:17,271 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-11-30 02:25:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:25:17,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-11-30 02:25:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:17,274 INFO L225 Difference]: With dead ends: 47 [2020-11-30 02:25:17,274 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:25:17,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:25:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:25:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-11-30 02:25:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:25:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-30 02:25:17,281 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 9 [2020-11-30 02:25:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:17,281 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-30 02:25:17,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:25:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-30 02:25:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:25:17,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:17,282 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:17,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:17,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:25:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:17,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1707384734, now seen corresponding path program 1 times [2020-11-30 02:25:17,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:17,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598079911] [2020-11-30 02:25:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:17,510 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:25:17,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113083834] [2020-11-30 02:25:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:17,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:25:17,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:17,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:17,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598079911] [2020-11-30 02:25:17,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:17,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113083834] [2020-11-30 02:25:17,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826315595] [2020-11-30 02:25:17,703 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:25:17,704 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:17,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:17,715 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:17,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:18,520 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:19,245 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-11-30 02:25:19,963 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-11-30 02:25:20,235 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-11-30 02:25:20,482 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-11-30 02:25:20,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:25:20,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 13 [2020-11-30 02:25:20,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549912616] [2020-11-30 02:25:20,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:25:20,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:25:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:25:20,485 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2020-11-30 02:25:20,682 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2020-11-30 02:25:21,053 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2020-11-30 02:25:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:21,289 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-11-30 02:25:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:25:21,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-30 02:25:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:21,292 INFO L225 Difference]: With dead ends: 65 [2020-11-30 02:25:21,292 INFO L226 Difference]: Without dead ends: 53 [2020-11-30 02:25:21,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:25:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-30 02:25:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2020-11-30 02:25:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 02:25:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-11-30 02:25:21,300 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 14 [2020-11-30 02:25:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:21,300 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-11-30 02:25:21,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:25:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-11-30 02:25:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:25:21,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:21,301 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:21,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:21,502 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:25:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:21,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1386743794, now seen corresponding path program 1 times [2020-11-30 02:25:21,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:21,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646424047] [2020-11-30 02:25:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:21,513 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:25:21,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394898800] [2020-11-30 02:25:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:25:21,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:21,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646424047] [2020-11-30 02:25:21,659 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394898800] [2020-11-30 02:25:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346132607] [2020-11-30 02:25:21,662 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:25:21,662 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:25:21,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:25:21,663 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:25:21,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:25:22,060 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:25:24,513 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 106 DAG size of output: 51 [2020-11-30 02:25:25,086 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2020-11-30 02:25:25,604 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2020-11-30 02:25:26,079 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 40 [2020-11-30 02:25:26,497 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-11-30 02:25:26,739 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2020-11-30 02:25:27,104 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2020-11-30 02:25:27,105 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:27,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:25:27,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-30 02:25:27,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658193605] [2020-11-30 02:25:27,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:25:27,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:25:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:25:27,107 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 9 states. [2020-11-30 02:25:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:27,247 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-11-30 02:25:27,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:25:27,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-11-30 02:25:27,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:27,248 INFO L225 Difference]: With dead ends: 69 [2020-11-30 02:25:27,248 INFO L226 Difference]: Without dead ends: 62 [2020-11-30 02:25:27,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-30 02:25:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-30 02:25:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2020-11-30 02:25:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 02:25:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-11-30 02:25:27,259 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2020-11-30 02:25:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:27,259 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-11-30 02:25:27,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:25:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-11-30 02:25:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:25:27,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:25:27,274 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:25:27,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-30 02:25:27,475 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:25:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:25:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1394602437, now seen corresponding path program 1 times [2020-11-30 02:25:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:25:27,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669066434] [2020-11-30 02:25:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:25:27,489 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:25:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543518942] [2020-11-30 02:25:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:25:27,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:25:27,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:25:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:25:27,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:48,792 WARN L193 SmtUtils]: Spent 16.57 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-11-30 02:26:06,966 WARN L193 SmtUtils]: Spent 10.52 s on a formula simplification that was a NOOP. DAG size: 45 [2020-11-30 02:26:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:26:07,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669066434] [2020-11-30 02:26:07,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:26:07,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543518942] [2020-11-30 02:26:07,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:26:07,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-11-30 02:26:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979469890] [2020-11-30 02:26:07,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:26:07,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:26:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:26:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=40, Unknown=5, NotChecked=0, Total=72 [2020-11-30 02:26:07,016 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 6 states. [2020-11-30 02:26:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:26:07,419 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-11-30 02:26:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:26:07,423 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 02:26:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:26:07,423 INFO L225 Difference]: With dead ends: 59 [2020-11-30 02:26:07,424 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 02:26:07,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=54, Invalid=73, Unknown=5, NotChecked=0, Total=132 [2020-11-30 02:26:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 02:26:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2020-11-30 02:26:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:26:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-30 02:26:07,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-11-30 02:26:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:26:07,429 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-30 02:26:07,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:26:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-30 02:26:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:26:07,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:26:07,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:26:07,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-30 02:26:07,652 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:26:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:26:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 833472689, now seen corresponding path program 1 times [2020-11-30 02:26:07,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:26:07,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688673087] [2020-11-30 02:26:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:26:07,665 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:26:07,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462336388] [2020-11-30 02:26:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:26:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:26:07,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-30 02:26:07,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:26:08,040 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2020-11-30 02:26:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:26:08,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:26:59,121 WARN L193 SmtUtils]: Spent 44.85 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-11-30 02:27:01,592 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse17 (div (mod c_ULTIMATE.start_main_~b~0 4294967296) 2))) (let ((.cse0 (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond)) (.cse16 (<= (mod .cse17 4294967296) (mod c_ULTIMATE.start_main_~r~0 4294967296))) (.cse13 (* (- 4294967295) c_ULTIMATE.start_main_~r~0)) (.cse14 (* 2 .cse17 c_ULTIMATE.start_main_~q~0)) (.cse15 (* (- 1) (mod c_ULTIMATE.start_main_~A~0 4294967296)))) (and (or .cse0 (forall ((aux_div_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547 Int) (aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233 Int) (aux_div_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321 Int) (aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345_278 Int) (aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321_266 Int)) (let ((.cse7 (* 4294967296 aux_div_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345)) (.cse9 (* 4294967296 aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345_278)) (.cse12 (* (div (mod c_ULTIMATE.start_main_~b~0 4294967296) 2) c_ULTIMATE.start_main_~q~0)) (.cse11 (* 4294967296 aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321_266)) (.cse10 (* 4294967296 aux_div_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321))) (let ((.cse2 (* 4294967295 aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233)) (.cse1 (+ .cse11 .cse10)) (.cse6 (+ (* 18446744069414584320 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547) (* 8589934592 .cse12))) (.cse8 (* 18446744065119617024 c_ULTIMATE.start_main_~r~0)) (.cse5 (+ .cse7 .cse9)) (.cse4 (* 4294967295 aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245)) (.cse3 (* 2 .cse12))) (or (< .cse1 (+ .cse2 c_ULTIMATE.start_main_~r~0 .cse3)) (<= (+ c_ULTIMATE.start_main_~r~0 .cse4 .cse3 4294967295) .cse5) (<= (+ .cse2 c_ULTIMATE.start_main_~r~0 .cse3 4294967295) .cse1) (< .cse6 (+ .cse7 .cse8 .cse9)) (< .cse9 0) (<= 4294967296 aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233) (<= 4294967296 .cse9) (< (+ (* 4294967296 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547) .cse3) (* 4294967295 c_ULTIMATE.start_main_~r~0)) (<= (+ .cse10 .cse8 4294967296) .cse6) (<= (+ .cse7 .cse8 4294967296) .cse6) (< .cse6 (+ .cse11 .cse10 .cse8)) (= (mod c_ULTIMATE.start_main_~A~0 4294967296) aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245) (<= 4294967296 .cse11) (< .cse11 0) (< .cse5 (+ c_ULTIMATE.start_main_~r~0 .cse4 .cse3))))))) (or .cse0 (<= (div (+ .cse13 .cse14 .cse15 (- 1)) 4294967296) (div (+ .cse13 .cse14 (- 4294967296)) 4294967296)) .cse16) (or .cse0 .cse16 (<= (div (+ .cse13 .cse14) 4294967296) (div (+ .cse13 .cse14 .cse15) 4294967296)))))) is different from true [2020-11-30 02:27:03,999 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse17 (div (mod c_ULTIMATE.start_main_~b~0 4294967296) 2)) (.cse18 (mod c_ULTIMATE.start_main_~A~0 4294967296))) (let ((.cse0 (not (= (mod (+ (* c_ULTIMATE.start_main_~q~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~r~0) 4294967296) .cse18))) (.cse16 (* (- 1) .cse18)) (.cse14 (* (- 4294967295) c_ULTIMATE.start_main_~r~0)) (.cse15 (* 2 .cse17 c_ULTIMATE.start_main_~q~0)) (.cse13 (<= (mod .cse17 4294967296) (mod c_ULTIMATE.start_main_~r~0 4294967296)))) (and (or .cse0 (forall ((aux_div_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547 Int) (aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233 Int) (aux_div_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321 Int) (aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345_278 Int) (aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321_266 Int)) (let ((.cse7 (* 4294967296 aux_div_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345)) (.cse9 (* 4294967296 aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345_278)) (.cse12 (* (div (mod c_ULTIMATE.start_main_~b~0 4294967296) 2) c_ULTIMATE.start_main_~q~0)) (.cse11 (* 4294967296 aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321_266)) (.cse10 (* 4294967296 aux_div_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321))) (let ((.cse2 (* 4294967295 aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233)) (.cse1 (+ .cse11 .cse10)) (.cse6 (+ (* 18446744069414584320 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547) (* 8589934592 .cse12))) (.cse8 (* 18446744065119617024 c_ULTIMATE.start_main_~r~0)) (.cse5 (+ .cse7 .cse9)) (.cse4 (* 4294967295 aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245)) (.cse3 (* 2 .cse12))) (or (< .cse1 (+ .cse2 c_ULTIMATE.start_main_~r~0 .cse3)) (<= (+ c_ULTIMATE.start_main_~r~0 .cse4 .cse3 4294967295) .cse5) (<= (+ .cse2 c_ULTIMATE.start_main_~r~0 .cse3 4294967295) .cse1) (< .cse6 (+ .cse7 .cse8 .cse9)) (< .cse9 0) (<= 4294967296 aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233) (<= 4294967296 .cse9) (< (+ (* 4294967296 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547) .cse3) (* 4294967295 c_ULTIMATE.start_main_~r~0)) (<= (+ .cse10 .cse8 4294967296) .cse6) (<= (+ .cse7 .cse8 4294967296) .cse6) (< .cse6 (+ .cse11 .cse10 .cse8)) (= (mod c_ULTIMATE.start_main_~A~0 4294967296) aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245) (<= 4294967296 .cse11) (< .cse11 0) (< .cse5 (+ c_ULTIMATE.start_main_~r~0 .cse4 .cse3))))))) (or .cse0 .cse13 (<= (div (+ .cse14 .cse15) 4294967296) (div (+ .cse14 .cse15 .cse16) 4294967296))) (or .cse0 (<= (div (+ .cse14 .cse15 .cse16 (- 1)) 4294967296) (div (+ .cse14 .cse15 (- 4294967296)) 4294967296)) .cse13)))) is different from true [2020-11-30 02:27:06,737 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse21 (mod c_ULTIMATE.start_main_~b~0 4294967296))) (let ((.cse18 (div .cse21 2)) (.cse19 (mod c_ULTIMATE.start_main_~r~0 4294967296)) (.cse20 (mod c_ULTIMATE.start_main_~A~0 4294967296))) (let ((.cse0 (not (= (mod (+ (* c_ULTIMATE.start_main_~q~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~r~0) 4294967296) .cse20))) (.cse1 (<= .cse21 .cse19)) (.cse17 (* (- 1) .cse20)) (.cse15 (* (- 4294967295) c_ULTIMATE.start_main_~r~0)) (.cse16 (* 2 .cse18 c_ULTIMATE.start_main_~q~0)) (.cse14 (<= (mod .cse18 4294967296) .cse19))) (and (or .cse0 .cse1 (forall ((aux_div_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245 Int) (aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547 Int) (aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233 Int) (aux_div_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321 Int) (aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345_278 Int) (aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321_266 Int)) (let ((.cse8 (* 4294967296 aux_div_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345)) (.cse10 (* 4294967296 aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245_345_278)) (.cse13 (* (div (mod c_ULTIMATE.start_main_~b~0 4294967296) 2) c_ULTIMATE.start_main_~q~0)) (.cse12 (* 4294967296 aux_div_aux_mod_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321_266)) (.cse11 (* 4294967296 aux_div_aux_mod_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233_321))) (let ((.cse3 (* 4294967295 aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233)) (.cse2 (+ .cse12 .cse11)) (.cse7 (+ (* 18446744069414584320 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547) (* 8589934592 .cse13))) (.cse9 (* 18446744065119617024 c_ULTIMATE.start_main_~r~0)) (.cse6 (+ .cse8 .cse10)) (.cse5 (* 4294967295 aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245)) (.cse4 (* 2 .cse13))) (or (< .cse2 (+ .cse3 c_ULTIMATE.start_main_~r~0 .cse4)) (<= (+ c_ULTIMATE.start_main_~r~0 .cse5 .cse4 4294967295) .cse6) (<= (+ .cse3 c_ULTIMATE.start_main_~r~0 .cse4 4294967295) .cse2) (< .cse7 (+ .cse8 .cse9 .cse10)) (< .cse10 0) (<= 4294967296 aux_div_aux_div_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_233) (<= 4294967296 .cse10) (< (+ (* 4294967296 aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_215_239_263_547) .cse4) (* 4294967295 c_ULTIMATE.start_main_~r~0)) (<= (+ .cse11 .cse9 4294967296) .cse7) (<= (+ .cse8 .cse9 4294967296) .cse7) (< .cse7 (+ .cse12 .cse11 .cse9)) (= (mod c_ULTIMATE.start_main_~A~0 4294967296) aux_div_aux_div_aux_mod_aux_mod_aux_div_aux_mod_v_ULTIMATE.start_main_~r~0_20_114_183_209_273_191_245) (<= 4294967296 .cse12) (< .cse12 0) (< .cse6 (+ c_ULTIMATE.start_main_~r~0 .cse5 .cse4))))))) (or .cse0 .cse1 .cse14 (<= (div (+ .cse15 .cse16) 4294967296) (div (+ .cse15 .cse16 .cse17) 4294967296))) (or .cse0 .cse1 (<= (div (+ .cse15 .cse16 .cse17 (- 1)) 4294967296) (div (+ .cse15 .cse16 (- 4294967296)) 4294967296)) .cse14))))) is different from true [2020-11-30 02:27:07,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688673087] [2020-11-30 02:27:07,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:27:07,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462336388] [2020-11-30 02:27:07,444 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-11-30 02:27:07,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179465910] [2020-11-30 02:27:07,447 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:27:07,447 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:27:07,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:27:07,448 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:27:07,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:27:08,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:08,341 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: should have been removed by DER at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminateConjuncts(XnfTir.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminateSingleDisjuct(XnfTir.java:143) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminate(XnfTir.java:114) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.applyEliminationInner(PartialQuantifierElimination.java:537) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.applyEliminationOuter(PartialQuantifierElimination.java:505) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.applyTir(PartialQuantifierElimination.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:285) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1133) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:27:08,346 INFO L168 Benchmark]: Toolchain (without parser) took 136514.22 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 51.8 MB in the beginning and 61.4 MB in the end (delta: -9.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:08,346 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 58.4 MB in the beginning and 58.4 MB in the end (delta: 28.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:08,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.13 ms. Allocated memory is still 83.9 MB. Free memory was 51.6 MB in the beginning and 61.1 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:08,347 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.36 ms. Allocated memory is still 83.9 MB. Free memory was 61.1 MB in the beginning and 59.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:08,348 INFO L168 Benchmark]: Boogie Preprocessor took 38.20 ms. Allocated memory is still 83.9 MB. Free memory was 59.7 MB in the beginning and 58.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:08,348 INFO L168 Benchmark]: RCFGBuilder took 572.27 ms. Allocated memory is still 83.9 MB. Free memory was 58.3 MB in the beginning and 41.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:08,349 INFO L168 Benchmark]: TraceAbstraction took 135582.24 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 41.5 MB in the beginning and 61.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:08,351 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory was 58.4 MB in the beginning and 58.4 MB in the end (delta: 28.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.13 ms. Allocated memory is still 83.9 MB. Free memory was 51.6 MB in the beginning and 61.1 MB in the end (delta: -9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.36 ms. Allocated memory is still 83.9 MB. Free memory was 61.1 MB in the beginning and 59.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.20 ms. Allocated memory is still 83.9 MB. Free memory was 59.7 MB in the beginning and 58.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 572.27 ms. Allocated memory is still 83.9 MB. Free memory was 58.3 MB in the beginning and 41.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 135582.24 ms. Allocated memory was 83.9 MB in the beginning and 104.9 MB in the end (delta: 21.0 MB). Free memory was 41.5 MB in the beginning and 61.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: should have been removed by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: should have been removed by DER: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminateConjuncts(XnfTir.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:27:10,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:27:10,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:27:10,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:27:10,922 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:27:10,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:27:10,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:27:10,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:27:10,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:27:10,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:27:10,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:27:10,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:27:10,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:27:10,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:27:10,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:27:10,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:27:10,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:27:10,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:27:10,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:27:10,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:27:10,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:27:10,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:27:10,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:27:10,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:27:10,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:27:10,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:27:11,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:27:11,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:27:11,003 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:27:11,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:27:11,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:27:11,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:27:11,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:27:11,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:27:11,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:27:11,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:27:11,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:27:11,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:27:11,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:27:11,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:27:11,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:27:11,015 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 02:27:11,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:27:11,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:27:11,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:27:11,059 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:27:11,060 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:27:11,060 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:27:11,060 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:27:11,061 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:27:11,061 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:27:11,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:27:11,063 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:27:11,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:27:11,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:27:11,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:27:11,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:27:11,065 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:27:11,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:27:11,065 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:27:11,065 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:27:11,066 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:27:11,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:27:11,066 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:27:11,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:27:11,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:27:11,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:27:11,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:27:11,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:27:11,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:27:11,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:27:11,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:27:11,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:27:11,068 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:27:11,069 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:27:11,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:27:11,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:27:11,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:27:11,070 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2570563cfcd810b6ed16bb44bfedbab29cf846e [2020-11-30 02:27:11,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:27:11,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:27:11,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:27:11,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:27:11,517 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:27:11,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2020-11-30 02:27:11,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/241b85408/a69647364d234598bf2f9202f77fd144/FLAG5e2b26551 [2020-11-30 02:27:12,092 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:27:12,092 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound5.i [2020-11-30 02:27:12,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/241b85408/a69647364d234598bf2f9202f77fd144/FLAG5e2b26551 [2020-11-30 02:27:12,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/data/241b85408/a69647364d234598bf2f9202f77fd144 [2020-11-30 02:27:12,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:27:12,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:27:12,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:27:12,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:27:12,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:27:12,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3ca8da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12, skipping insertion in model container [2020-11-30 02:27:12,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:27:12,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:27:12,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:27:12,758 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:27:12,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:27:12,840 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:27:12,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12 WrapperNode [2020-11-30 02:27:12,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:27:12,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:27:12,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:27:12,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:27:12,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:27:12,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:27:12,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:27:12,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:27:12,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:27:12,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:27:12,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:27:12,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:27:12,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/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 [2020-11-30 02:27:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 02:27:12,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:27:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:27:12,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:27:13,516 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:27:13,516 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-30 02:27:13,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:27:13 BoogieIcfgContainer [2020-11-30 02:27:13,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:27:13,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:27:13,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:27:13,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:27:13,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:27:12" (1/3) ... [2020-11-30 02:27:13,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efcbc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:27:13, skipping insertion in model container [2020-11-30 02:27:13,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (2/3) ... [2020-11-30 02:27:13,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efcbc5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:27:13, skipping insertion in model container [2020-11-30 02:27:13,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:27:13" (3/3) ... [2020-11-30 02:27:13,529 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound5.i [2020-11-30 02:27:13,541 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:27:13,545 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 02:27:13,557 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 02:27:13,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:27:13,596 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:27:13,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:27:13,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:27:13,596 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:27:13,596 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:27:13,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:27:13,597 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:27:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 02:27:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:27:13,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:13,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:13,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:13,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:13,626 INFO L82 PathProgramCache]: Analyzing trace with hash -608290408, now seen corresponding path program 1 times [2020-11-30 02:27:13,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:13,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986912480] [2020-11-30 02:27:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:13,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 02:27:13,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:13,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:13,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986912480] [2020-11-30 02:27:13,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:13,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:27:13,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500483443] [2020-11-30 02:27:13,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:27:13,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:27:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:27:13,793 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-30 02:27:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:13,809 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-11-30 02:27:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:27:13,810 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-11-30 02:27:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:13,820 INFO L225 Difference]: With dead ends: 43 [2020-11-30 02:27:13,820 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 02:27:13,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:27:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 02:27:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 02:27:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:27:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-11-30 02:27:13,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2020-11-30 02:27:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:13,852 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-11-30 02:27:13,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:27:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-11-30 02:27:13,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:27:13,853 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:13,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:14,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:27:14,062 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:14,063 INFO L82 PathProgramCache]: Analyzing trace with hash -802151346, now seen corresponding path program 1 times [2020-11-30 02:27:14,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:14,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359548772] [2020-11-30 02:27:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:14,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:27:14,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:14,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:14,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:14,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359548772] [2020-11-30 02:27:14,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:14,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:27:14,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901716987] [2020-11-30 02:27:14,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:27:14,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:14,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:27:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:27:14,203 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2020-11-30 02:27:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:14,268 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-11-30 02:27:14,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:27:14,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:27:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:14,270 INFO L225 Difference]: With dead ends: 41 [2020-11-30 02:27:14,270 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 02:27:14,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:27:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 02:27:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-11-30 02:27:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:27:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-11-30 02:27:14,278 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 10 [2020-11-30 02:27:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:14,278 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-11-30 02:27:14,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:27:14,279 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-11-30 02:27:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:27:14,279 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:14,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:14,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:27:14,500 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:14,500 INFO L82 PathProgramCache]: Analyzing trace with hash 550186191, now seen corresponding path program 1 times [2020-11-30 02:27:14,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:14,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706440475] [2020-11-30 02:27:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:27:14,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:14,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:15,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706440475] [2020-11-30 02:27:15,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:15,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-11-30 02:27:15,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637691359] [2020-11-30 02:27:15,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:27:15,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:15,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:27:15,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:27:15,077 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2020-11-30 02:27:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:20,075 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-11-30 02:27:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:27:20,079 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-30 02:27:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:20,080 INFO L225 Difference]: With dead ends: 58 [2020-11-30 02:27:20,080 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 02:27:20,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:27:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 02:27:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-11-30 02:27:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 02:27:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-11-30 02:27:20,088 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 11 [2020-11-30 02:27:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:20,089 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-11-30 02:27:20,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:27:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-11-30 02:27:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:27:20,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:20,090 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:20,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 02:27:20,298 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1398907534, now seen corresponding path program 1 times [2020-11-30 02:27:20,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:20,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762589206] [2020-11-30 02:27:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:27:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:20,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:20,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762589206] [2020-11-30 02:27:20,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2030983140] [2020-11-30 02:27:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:27:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:27:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:20,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243578307] [2020-11-30 02:27:20,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:27:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:20,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:20,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:20,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2020-11-30 02:27:20,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740260635] [2020-11-30 02:27:20,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:27:20,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:20,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:27:20,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:27:20,788 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 10 states. [2020-11-30 02:27:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:21,067 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2020-11-30 02:27:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:27:21,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-11-30 02:27:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:21,070 INFO L225 Difference]: With dead ends: 89 [2020-11-30 02:27:21,070 INFO L226 Difference]: Without dead ends: 74 [2020-11-30 02:27:21,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:27:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-30 02:27:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2020-11-30 02:27:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 02:27:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-11-30 02:27:21,080 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 16 [2020-11-30 02:27:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:21,080 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-11-30 02:27:21,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:27:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-11-30 02:27:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:27:21,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:21,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:21,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:21,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:21,690 INFO L82 PathProgramCache]: Analyzing trace with hash -175352757, now seen corresponding path program 1 times [2020-11-30 02:27:21,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:21,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735329112] [2020-11-30 02:27:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:27:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:21,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:21,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735329112] [2020-11-30 02:27:21,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:21,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:27:21,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894760340] [2020-11-30 02:27:21,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:27:21,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:27:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:27:21,794 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2020-11-30 02:27:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:21,881 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-11-30 02:27:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:27:21,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-30 02:27:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:21,885 INFO L225 Difference]: With dead ends: 68 [2020-11-30 02:27:21,885 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 02:27:21,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:27:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 02:27:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-11-30 02:27:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-30 02:27:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-11-30 02:27:21,891 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2020-11-30 02:27:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:21,892 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-11-30 02:27:21,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:27:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-11-30 02:27:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:27:21,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:21,893 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:22,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-30 02:27:22,094 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:22,095 INFO L82 PathProgramCache]: Analyzing trace with hash 63534735, now seen corresponding path program 1 times [2020-11-30 02:27:22,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:22,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671654742] [2020-11-30 02:27:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:22,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:27:22,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:22,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:23,340 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-11-30 02:27:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671654742] [2020-11-30 02:27:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792047441] [2020-11-30 02:27:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:27:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:23,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:27:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:23,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:24,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458300425] [2020-11-30 02:27:24,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:24,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:27:24,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:24,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:24,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:24,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6, 6, 7, 7] total 15 [2020-11-30 02:27:24,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127114545] [2020-11-30 02:27:24,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 02:27:24,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:24,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 02:27:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:27:24,158 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 15 states. [2020-11-30 02:27:24,622 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2020-11-30 02:27:26,236 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2020-11-30 02:27:28,661 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-11-30 02:27:33,035 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-11-30 02:27:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:33,222 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-11-30 02:27:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 02:27:33,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-11-30 02:27:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:33,226 INFO L225 Difference]: With dead ends: 104 [2020-11-30 02:27:33,226 INFO L226 Difference]: Without dead ends: 84 [2020-11-30 02:27:33,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-11-30 02:27:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-30 02:27:33,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 53. [2020-11-30 02:27:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 02:27:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-11-30 02:27:33,237 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 17 [2020-11-30 02:27:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:33,237 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-11-30 02:27:33,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 02:27:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-11-30 02:27:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 02:27:33,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:33,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:33,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:33,855 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:33,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1151243479, now seen corresponding path program 1 times [2020-11-30 02:27:33,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:33,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836996548] [2020-11-30 02:27:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:33,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:27:33,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:33,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:34,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836996548] [2020-11-30 02:27:34,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [502884242] [2020-11-30 02:27:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/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 [2020-11-30 02:27:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:27:34,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:34,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:34,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135153530] [2020-11-30 02:27:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:27:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:34,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:34,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:34,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5, 4, 5] total 7 [2020-11-30 02:27:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130313218] [2020-11-30 02:27:34,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:27:34,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:27:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:27:34,204 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 7 states. [2020-11-30 02:27:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:34,366 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2020-11-30 02:27:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:27:34,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-11-30 02:27:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:34,371 INFO L225 Difference]: With dead ends: 92 [2020-11-30 02:27:34,372 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 02:27:34,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:27:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 02:27:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-11-30 02:27:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 02:27:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-11-30 02:27:34,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 24 [2020-11-30 02:27:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:34,382 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-11-30 02:27:34,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:27:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-11-30 02:27:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 02:27:34,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:34,384 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:35,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk,12 mathsat -unsat_core_generation=3 [2020-11-30 02:27:35,013 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash -587772687, now seen corresponding path program 2 times [2020-11-30 02:27:35,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:35,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20119649] [2020-11-30 02:27:35,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:35,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:27:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:27:35,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:27:35,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:35,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:35,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20119649] [2020-11-30 02:27:35,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [709067413] [2020-11-30 02:27:35,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:27:35,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:27:35,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:27:35,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:27:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:35,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693055309] [2020-11-30 02:27:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:35,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:27:35,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:27:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:27:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:35,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:35,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:35,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2020-11-30 02:27:35,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094919735] [2020-11-30 02:27:35,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 02:27:35,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 02:27:35,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:27:35,838 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 16 states. [2020-11-30 02:27:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:36,982 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-11-30 02:27:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 02:27:36,989 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-11-30 02:27:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:36,990 INFO L225 Difference]: With dead ends: 125 [2020-11-30 02:27:36,991 INFO L226 Difference]: Without dead ends: 82 [2020-11-30 02:27:36,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:27:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-30 02:27:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-11-30 02:27:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 02:27:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2020-11-30 02:27:37,010 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 25 [2020-11-30 02:27:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:37,010 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2020-11-30 02:27:37,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 02:27:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2020-11-30 02:27:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 02:27:37,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:37,012 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:37,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3,16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:37,613 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1070639596, now seen corresponding path program 1 times [2020-11-30 02:27:37,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:37,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129671380] [2020-11-30 02:27:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:37,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 02:27:37,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:37,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:39,327 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-30 02:27:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129671380] [2020-11-30 02:27:40,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1735589963] [2020-11-30 02:27:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/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 [2020-11-30 02:27:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:27:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:41,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287442450] [2020-11-30 02:27:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-30 02:27:41,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:42,348 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-30 02:27:42,348 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:27:43,993 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-11-30 02:27:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-30 02:27:44,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:44,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8, 8, 11, 8] total 26 [2020-11-30 02:27:44,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143310151] [2020-11-30 02:27:44,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-30 02:27:44,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-30 02:27:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2020-11-30 02:27:44,031 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 26 states. [2020-11-30 02:27:44,695 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 15 [2020-11-30 02:27:45,106 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-11-30 02:27:46,901 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-30 02:27:47,574 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 20 [2020-11-30 02:27:51,466 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-11-30 02:27:52,073 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-30 02:27:52,555 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-11-30 02:27:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:52,859 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-11-30 02:27:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-30 02:27:52,861 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2020-11-30 02:27:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:52,862 INFO L225 Difference]: With dead ends: 120 [2020-11-30 02:27:52,862 INFO L226 Difference]: Without dead ends: 85 [2020-11-30 02:27:52,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=384, Invalid=1022, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 02:27:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-30 02:27:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-11-30 02:27:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-30 02:27:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-11-30 02:27:52,873 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 26 [2020-11-30 02:27:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:52,874 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-11-30 02:27:52,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-30 02:27:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-11-30 02:27:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-30 02:27:52,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:52,876 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:53,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:27:53,487 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1280777140, now seen corresponding path program 1 times [2020-11-30 02:27:53,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:53,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063231901] [2020-11-30 02:27:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:27:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-30 02:27:53,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-30 02:27:53,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063231901] [2020-11-30 02:27:53,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [524424984] [2020-11-30 02:27:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:27:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:27:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-30 02:27:54,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 102 proven. 40 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-11-30 02:27:54,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179812968] [2020-11-30 02:27:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:54,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-30 02:27:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 32 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 02:27:54,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-11-30 02:27:54,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:54,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 13, 9] total 27 [2020-11-30 02:27:54,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854952237] [2020-11-30 02:27:54,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 02:27:54,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 02:27:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:27:54,911 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 27 states. [2020-11-30 02:27:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:55,179 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-11-30 02:27:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:27:55,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-11-30 02:27:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:55,180 INFO L225 Difference]: With dead ends: 62 [2020-11-30 02:27:55,180 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:27:55,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-11-30 02:27:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:27:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:27:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:27:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:27:55,181 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2020-11-30 02:27:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:55,182 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:27:55,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 02:27:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:27:55,182 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:27:55,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3,22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:55,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:27:56,805 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-11-30 02:27:58,018 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2020-11-30 02:27:58,021 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 02:27:58,021 INFO L274 CegarLoopResult]: For program point L19(lines 19 22) no Hoare annotation was computed. [2020-11-30 02:27:58,022 INFO L270 CegarLoopResult]: At program point L19-1(line 40) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~A~0 (bvadd (bvmul ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~r~0))) (.cse2 (= (_ bv1 32) ULTIMATE.start_main_~B~0)) (.cse1 (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (.cse3 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0)) (.cse4 (= (_ bv0 32) ULTIMATE.start_main_~q~0))) (or (and (= (_ bv5 32) ~counter~0) .cse0 .cse1 (= (bvadd (bvmul (bvmul (bvudiv ULTIMATE.start_main_~b~0 (_ bv2 32)) ULTIMATE.start_main_~q~0) (_ bv2 32)) ULTIMATE.start_main_~r~0) ULTIMATE.start_main_~A~0)) (and .cse0 .cse1 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) .cse2) (and .cse1 .cse3 (= (_ bv2 32) ULTIMATE.start_main_~b~0) .cse4 .cse2) (and (not (bvuge ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0)) (bvuge ULTIMATE.start_main_~r~0 (_ bv2 32)) .cse1 .cse3 .cse4 (= (_ bv4 32) ULTIMATE.start_main_~b~0) (= (_ bv4 32) ~counter~0)))) [2020-11-30 02:27:58,022 INFO L274 CegarLoopResult]: For program point L19-2(lines 19 22) no Hoare annotation was computed. [2020-11-30 02:27:58,022 INFO L277 CegarLoopResult]: At program point L19-3(lines 18 24) the Hoare annotation is: true [2020-11-30 02:27:58,022 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 02:27:58,022 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:27:58,022 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 02:27:58,022 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 02:27:58,022 INFO L274 CegarLoopResult]: For program point L20(lines 20 21) no Hoare annotation was computed. [2020-11-30 02:27:58,022 INFO L274 CegarLoopResult]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L277 CegarLoopResult]: At program point L49(lines 26 50) the Hoare annotation is: true [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point L12-4(line 12) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point L12-6(line 12) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point L38(lines 38 47) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point L38-2(lines 38 47) no Hoare annotation was computed. [2020-11-30 02:27:58,023 INFO L274 CegarLoopResult]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2020-11-30 02:27:58,024 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse5 (bvmul ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0))) (let ((.cse3 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0)) (.cse2 (= (_ bv0 32) ULTIMATE.start_main_~q~0)) (.cse4 (= (_ bv1 32) ULTIMATE.start_main_~B~0)) (.cse0 (= ULTIMATE.start_main_~A~0 (bvadd .cse5 ULTIMATE.start_main_~r~0))) (.cse1 (= (bvadd (bvmul .cse5 (_ bv2 32)) ULTIMATE.start_main_~r~0) ULTIMATE.start_main_~A~0))) (or (and .cse0 .cse1 (= (_ bv4 32) ~counter~0)) (and .cse0 (= (_ bv3 32) ~counter~0) (= (_ bv8 32) ULTIMATE.start_main_~b~0) .cse2 (bvuge ULTIMATE.start_main_~r~0 (_ bv4 32))) (and (= (_ bv0 32) ~counter~0) .cse3 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) .cse2 .cse4) (and (bvuge ULTIMATE.start_main_~r~0 (_ bv2 32)) (= (_ bv2 32) ~counter~0) .cse3 .cse2 (= (_ bv4 32) ULTIMATE.start_main_~b~0)) (and .cse0 (= ULTIMATE.start_main_~b~0 (bvmul ULTIMATE.start_main_~B~0 (_ bv2 32))) (= (_ bv1 32) ~counter~0) .cse2 .cse4) (and (= (_ bv5 32) ~counter~0) .cse0 .cse1)))) [2020-11-30 02:27:58,024 INFO L274 CegarLoopResult]: For program point L43(lines 43 46) no Hoare annotation was computed. [2020-11-30 02:27:58,024 INFO L274 CegarLoopResult]: For program point L43-2(lines 26 50) no Hoare annotation was computed. [2020-11-30 02:27:58,024 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-11-30 02:27:58,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:27:58 BoogieIcfgContainer [2020-11-30 02:27:58,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:27:58,049 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:27:58,049 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:27:58,049 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:27:58,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:27:13" (3/4) ... [2020-11-30 02:27:58,053 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:27:58,062 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 02:27:58,063 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 02:27:58,063 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:27:58,063 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:27:58,105 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_85f4d7f1-00d1-4ded-baab-84fd5d8a378b/bin/utaipan/witness.graphml [2020-11-30 02:27:58,105 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:27:58,106 INFO L168 Benchmark]: Toolchain (without parser) took 45604.71 ms. Allocated memory was 54.5 MB in the beginning and 83.9 MB in the end (delta: 29.4 MB). Free memory was 32.3 MB in the beginning and 59.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 1.5 kB. Max. memory is 16.1 GB. [2020-11-30 02:27:58,107 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:58,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.39 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 32.1 MB in the beginning and 52.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:58,108 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.81 ms. Allocated memory is still 69.2 MB. Free memory was 52.7 MB in the beginning and 51.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:58,108 INFO L168 Benchmark]: Boogie Preprocessor took 26.41 ms. Allocated memory is still 69.2 MB. Free memory was 51.3 MB in the beginning and 50.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:58,109 INFO L168 Benchmark]: RCFGBuilder took 610.99 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 52.1 MB in the end (delta: -2.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:58,109 INFO L168 Benchmark]: TraceAbstraction took 44528.79 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 51.9 MB in the beginning and 62.3 MB in the end (delta: -10.5 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:58,110 INFO L168 Benchmark]: Witness Printer took 56.30 ms. Allocated memory is still 83.9 MB. Free memory was 62.3 MB in the beginning and 59.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:58,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 37.3 MB in the beginning and 37.2 MB in the end (delta: 62.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.39 ms. Allocated memory was 54.5 MB in the beginning and 69.2 MB in the end (delta: 14.7 MB). Free memory was 32.1 MB in the beginning and 52.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.81 ms. Allocated memory is still 69.2 MB. Free memory was 52.7 MB in the beginning and 51.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.41 ms. Allocated memory is still 69.2 MB. Free memory was 51.3 MB in the beginning and 50.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 610.99 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 52.1 MB in the end (delta: -2.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 44528.79 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 51.9 MB in the beginning and 62.3 MB in the end (delta: -10.5 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. * Witness Printer took 56.30 ms. Allocated memory is still 83.9 MB. Free memory was 62.3 MB in the beginning and 59.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((A == ~bvadd64(~bvmul32(q, b), r) && ~bvadd64(~bvmul32(~bvmul32(q, b), 2bv32), r) == A) && 4bv32 == counter) || ((((A == ~bvadd64(~bvmul32(q, b), r) && 3bv32 == counter) && 8bv32 == b) && 0bv32 == q) && ~bvuge32(r, 4bv32))) || ((((0bv32 == counter && r == A) && b == B) && 0bv32 == q) && 1bv32 == B)) || ((((~bvuge32(r, 2bv32) && 2bv32 == counter) && r == A) && 0bv32 == q) && 4bv32 == b)) || ((((A == ~bvadd64(~bvmul32(q, b), r) && b == ~bvmul32(B, 2bv32)) && 1bv32 == counter) && 0bv32 == q) && 1bv32 == B)) || ((5bv32 == counter && A == ~bvadd64(~bvmul32(q, b), r)) && ~bvadd64(~bvmul32(~bvmul32(q, b), 2bv32), r) == A) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((5bv32 == counter && A == ~bvadd64(~bvmul32(q, b), r)) && ~bvadd64(cond, 4294967295bv32) == 0bv32) && ~bvadd64(~bvmul32(~bvmul32(~bvudiv32(b, 2bv32), q), 2bv32), r) == A) || (((A == ~bvadd64(~bvmul32(q, b), r) && ~bvadd64(cond, 4294967295bv32) == 0bv32) && b == B) && 1bv32 == B)) || ((((~bvadd64(cond, 4294967295bv32) == 0bv32 && r == A) && 2bv32 == b) && 0bv32 == q) && 1bv32 == B)) || ((((((!~bvuge32(r, b) && ~bvuge32(r, 2bv32)) && ~bvadd64(cond, 4294967295bv32) == 0bv32) && r == A) && 0bv32 == q) && 4bv32 == b) && 4bv32 == counter) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42.1s, OverallIterations: 10, TraceHistogramMax: 12, AutomataDifference: 24.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 255 SDtfs, 607 SDslu, 1215 SDs, 0 SdLazy, 787 SolverSat, 234 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 17.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1058 GetRequests, 907 SyntacticMatches, 8 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 16.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 114 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 20 NumberOfFragments, 207 HoareAnnotationTreeSize, 4 FomulaSimplifications, 203 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 312 FormulaSimplificationTreeSizeReductionInter, 2.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 10.2s InterpolantComputationTime, 529 NumberOfCodeBlocks, 529 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1014 ConstructedInterpolants, 1 QuantifiedInterpolants, 122753 SizeOfPredicates, 93 NumberOfNonLiveVariables, 1340 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 44 InterpolantComputations, 8 PerfectInterpolantSequences, 942/1620 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...