./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Primes.c --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_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Primes.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 c04652d270e46f53d045684d293397aaf1836f58 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:01:32,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:01:32,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:01:32,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:01:32,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:01:32,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:01:32,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:01:32,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:01:32,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:01:32,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:01:32,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:01:32,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:01:32,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:01:32,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:01:32,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:01:32,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:01:32,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:01:32,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:01:32,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:01:32,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:01:32,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:01:32,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:01:32,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:01:32,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:01:32,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:01:32,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:01:32,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:01:32,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:01:32,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:01:32,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:01:32,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:01:32,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:01:32,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:01:32,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:01:32,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:01:32,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:01:32,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:01:32,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:01:32,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:01:32,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:01:32,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:01:32,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:01:32,843 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:01:32,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:01:32,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:01:32,844 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:01:32,844 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:01:32,844 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:01:32,844 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:01:32,845 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:01:32,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:01:32,845 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:01:32,845 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:01:32,845 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:01:32,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:01:32,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:01:32,850 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:01:32,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:01:32,851 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:01:32,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:01:32,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:01:32,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:01:32,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:01:32,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:01:32,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:01:32,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:01:32,853 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:01:32,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:01:32,853 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:01:32,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:01:32,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:01:32,854 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:01:32,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:01:32,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:32,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:01:32,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:01:32,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:01:32,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:01:32,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:01:32,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:01:32,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:01:32,856 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:01:32,856 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_c02fda18-492c-4d17-b665-bd3a66becc0c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c04652d270e46f53d045684d293397aaf1836f58 [2020-11-22 13:01:33,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:01:33,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:01:33,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:01:33,108 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:01:33,111 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:01:33,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/../../sv-benchmarks/c/recursive/Primes.c [2020-11-22 13:01:33,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/data/cb814acd1/4b6ea7faf957488bb036383cf424e83d/FLAGac15b9d50 [2020-11-22 13:01:33,643 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:01:33,643 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/sv-benchmarks/c/recursive/Primes.c [2020-11-22 13:01:33,659 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/data/cb814acd1/4b6ea7faf957488bb036383cf424e83d/FLAGac15b9d50 [2020-11-22 13:01:34,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/data/cb814acd1/4b6ea7faf957488bb036383cf424e83d [2020-11-22 13:01:34,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:01:34,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:01:34,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:34,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:01:34,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:01:34,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74016a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34, skipping insertion in model container [2020-11-22 13:01:34,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:01:34,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:01:34,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:34,371 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:01:34,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:34,407 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:01:34,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34 WrapperNode [2020-11-22 13:01:34,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:34,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:34,409 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:01:34,409 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:01:34,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:34,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:01:34,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:01:34,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:01:34,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... [2020-11-22 13:01:34,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:01:34,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:01:34,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:01:34,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:01:34,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 [2020-11-22 13:01:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure multiple_of [2020-11-22 13:01:34,520 INFO L138 BoogieDeclarations]: Found implementation of procedure multiple_of [2020-11-22 13:01:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-11-22 13:01:34,521 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-11-22 13:01:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure is_prime_ [2020-11-22 13:01:34,521 INFO L138 BoogieDeclarations]: Found implementation of procedure is_prime_ [2020-11-22 13:01:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:01:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:01:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:01:34,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:01:34,990 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:01:34,990 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-22 13:01:34,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:34 BoogieIcfgContainer [2020-11-22 13:01:34,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:01:34,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:01:34,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:01:34,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:01:34,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:01:34" (1/3) ... [2020-11-22 13:01:34,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb43ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:34, skipping insertion in model container [2020-11-22 13:01:34,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:34" (2/3) ... [2020-11-22 13:01:35,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb43ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:34, skipping insertion in model container [2020-11-22 13:01:35,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:34" (3/3) ... [2020-11-22 13:01:35,001 INFO L111 eAbstractionObserver]: Analyzing ICFG Primes.c [2020-11-22 13:01:35,012 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:01:35,017 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:01:35,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:01:35,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:01:35,052 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:01:35,052 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:01:35,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:01:35,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:01:35,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:01:35,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:01:35,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:01:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-11-22 13:01:35,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 13:01:35,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:35,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:35,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:35,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:35,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1142019562, now seen corresponding path program 1 times [2020-11-22 13:01:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:35,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925175390] [2020-11-22 13:01:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:35,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925175390] [2020-11-22 13:01:35,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:35,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:01:35,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62861616] [2020-11-22 13:01:35,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:01:35,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:35,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:01:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:35,270 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-11-22 13:01:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:35,317 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2020-11-22 13:01:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:01:35,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-22 13:01:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:35,327 INFO L225 Difference]: With dead ends: 54 [2020-11-22 13:01:35,327 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 13:01:35,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 13:01:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-22 13:01:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 13:01:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-11-22 13:01:35,380 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 13 [2020-11-22 13:01:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:35,381 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-11-22 13:01:35,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:01:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-11-22 13:01:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-22 13:01:35,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:35,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:35,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:01:35,384 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:35,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1594152675, now seen corresponding path program 1 times [2020-11-22 13:01:35,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:35,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646168107] [2020-11-22 13:01:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:35,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646168107] [2020-11-22 13:01:35,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:35,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:01:35,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876971355] [2020-11-22 13:01:35,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:35,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:35,521 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 6 states. [2020-11-22 13:01:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:35,608 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-11-22 13:01:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:35,609 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-22 13:01:35,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:35,612 INFO L225 Difference]: With dead ends: 53 [2020-11-22 13:01:35,613 INFO L226 Difference]: Without dead ends: 49 [2020-11-22 13:01:35,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:35,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-22 13:01:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-11-22 13:01:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:01:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-11-22 13:01:35,637 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 20 [2020-11-22 13:01:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:35,638 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-11-22 13:01:35,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-11-22 13:01:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 13:01:35,643 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:35,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:35,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:01:35,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:35,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1422877249, now seen corresponding path program 1 times [2020-11-22 13:01:35,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:35,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835335750] [2020-11-22 13:01:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:35,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835335750] [2020-11-22 13:01:35,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:35,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:01:35,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769198797] [2020-11-22 13:01:35,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:35,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:35,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:35,764 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 5 states. [2020-11-22 13:01:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:35,840 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2020-11-22 13:01:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:35,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-11-22 13:01:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:35,844 INFO L225 Difference]: With dead ends: 55 [2020-11-22 13:01:35,844 INFO L226 Difference]: Without dead ends: 51 [2020-11-22 13:01:35,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-22 13:01:35,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-22 13:01:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:01:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-11-22 13:01:35,860 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 21 [2020-11-22 13:01:35,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:35,861 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-11-22 13:01:35,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-11-22 13:01:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-22 13:01:35,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:35,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:35,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:01:35,866 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash -224008013, now seen corresponding path program 1 times [2020-11-22 13:01:35,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:35,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123136951] [2020-11-22 13:01:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-22 13:01:35,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123136951] [2020-11-22 13:01:35,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:35,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:01:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937488865] [2020-11-22 13:01:35,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:35,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:35,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:35,963 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 6 states. [2020-11-22 13:01:36,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:36,030 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2020-11-22 13:01:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:36,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-22 13:01:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:36,032 INFO L225 Difference]: With dead ends: 72 [2020-11-22 13:01:36,032 INFO L226 Difference]: Without dead ends: 51 [2020-11-22 13:01:36,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-22 13:01:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-22 13:01:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-22 13:01:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2020-11-22 13:01:36,042 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 28 [2020-11-22 13:01:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:36,042 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2020-11-22 13:01:36,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:36,043 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2020-11-22 13:01:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-22 13:01:36,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:36,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:36,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:01:36,046 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash 922156174, now seen corresponding path program 1 times [2020-11-22 13:01:36,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:36,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791259145] [2020-11-22 13:01:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:01:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791259145] [2020-11-22 13:01:36,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244320503] [2020-11-22 13:01:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 [2020-11-22 13:01:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-22 13:01:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 13:01:36,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:36,496 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:01:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:01:36,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492326600] [2020-11-22 13:01:36,586 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2020-11-22 13:01:36,586 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:36,598 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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) [2020-11-22 13:01:36,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:36,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2020-11-22 13:01:36,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475127410] [2020-11-22 13:01:36,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 13:01:36,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:36,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 13:01:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-22 13:01:36,613 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand 11 states. [2020-11-22 13:01:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:36,764 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2020-11-22 13:01:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 13:01:36,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-11-22 13:01:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:36,767 INFO L225 Difference]: With dead ends: 66 [2020-11-22 13:01:36,767 INFO L226 Difference]: Without dead ends: 49 [2020-11-22 13:01:36,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:01:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-22 13:01:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-11-22 13:01:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:01:36,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2020-11-22 13:01:36,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 29 [2020-11-22 13:01:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:36,775 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2020-11-22 13:01:36,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 13:01:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2020-11-22 13:01:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-22 13:01:36,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:36,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:36,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:36,997 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1100424022, now seen corresponding path program 1 times [2020-11-22 13:01:36,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:36,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826066353] [2020-11-22 13:01:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:01:37,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826066353] [2020-11-22 13:01:37,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601028050] [2020-11-22 13:01:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 [2020-11-22 13:01:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-22 13:01:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:01:37,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:01:37,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582366113] [2020-11-22 13:01:37,803 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2020-11-22 13:01:37,803 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:37,804 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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) [2020-11-22 13:01:37,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:37,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2020-11-22 13:01:37,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347669364] [2020-11-22 13:01:37,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-22 13:01:37,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:37,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-22 13:01:37,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-11-22 13:01:37,806 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 21 states. [2020-11-22 13:01:38,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:38,225 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-11-22 13:01:38,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-22 13:01:38,226 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-11-22 13:01:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:38,227 INFO L225 Difference]: With dead ends: 68 [2020-11-22 13:01:38,227 INFO L226 Difference]: Without dead ends: 52 [2020-11-22 13:01:38,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2020-11-22 13:01:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-22 13:01:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-11-22 13:01:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:01:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-11-22 13:01:38,236 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 30 [2020-11-22 13:01:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:38,236 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-11-22 13:01:38,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-22 13:01:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-11-22 13:01:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-22 13:01:38,237 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:38,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:38,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:38,454 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:38,454 INFO L82 PathProgramCache]: Analyzing trace with hash -323480466, now seen corresponding path program 1 times [2020-11-22 13:01:38,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:38,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487727711] [2020-11-22 13:01:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:01:38,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487727711] [2020-11-22 13:01:38,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:38,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:01:38,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842859781] [2020-11-22 13:01:38,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:38,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:38,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:38,536 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 6 states. [2020-11-22 13:01:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:38,689 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-11-22 13:01:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:38,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-22 13:01:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:38,691 INFO L225 Difference]: With dead ends: 70 [2020-11-22 13:01:38,691 INFO L226 Difference]: Without dead ends: 51 [2020-11-22 13:01:38,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:01:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-22 13:01:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-22 13:01:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 13:01:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-11-22 13:01:38,699 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 32 [2020-11-22 13:01:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:38,699 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-11-22 13:01:38,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-11-22 13:01:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-22 13:01:38,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:38,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:38,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 13:01:38,709 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash 579362011, now seen corresponding path program 1 times [2020-11-22 13:01:38,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:38,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714442506] [2020-11-22 13:01:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-22 13:01:38,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714442506] [2020-11-22 13:01:38,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:38,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:01:38,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916334089] [2020-11-22 13:01:38,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:01:38,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:01:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:38,778 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 4 states. [2020-11-22 13:01:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:38,801 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2020-11-22 13:01:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:01:38,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-11-22 13:01:38,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:38,806 INFO L225 Difference]: With dead ends: 99 [2020-11-22 13:01:38,806 INFO L226 Difference]: Without dead ends: 53 [2020-11-22 13:01:38,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:01:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-22 13:01:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-22 13:01:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-22 13:01:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2020-11-22 13:01:38,816 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 50 [2020-11-22 13:01:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:38,816 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-11-22 13:01:38,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:01:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2020-11-22 13:01:38,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-22 13:01:38,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:38,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:38,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 13:01:38,827 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1388900629, now seen corresponding path program 1 times [2020-11-22 13:01:38,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:38,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336425608] [2020-11-22 13:01:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-22 13:01:38,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336425608] [2020-11-22 13:01:38,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205434864] [2020-11-22 13:01:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 [2020-11-22 13:01:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 13:01:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-22 13:01:38,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-22 13:01:39,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-22 13:01:39,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2020-11-22 13:01:39,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424168170] [2020-11-22 13:01:39,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:39,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:39,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:01:39,113 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand 5 states. [2020-11-22 13:01:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:39,193 INFO L93 Difference]: Finished difference Result 106 states and 139 transitions. [2020-11-22 13:01:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:39,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-11-22 13:01:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:39,196 INFO L225 Difference]: With dead ends: 106 [2020-11-22 13:01:39,197 INFO L226 Difference]: Without dead ends: 56 [2020-11-22 13:01:39,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:01:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-22 13:01:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-11-22 13:01:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-22 13:01:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-11-22 13:01:39,208 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 51 [2020-11-22 13:01:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:39,208 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-11-22 13:01:39,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-11-22 13:01:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-22 13:01:39,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:39,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:39,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:39,430 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:39,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1428215123, now seen corresponding path program 1 times [2020-11-22 13:01:39,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:39,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140112479] [2020-11-22 13:01:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-22 13:01:39,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140112479] [2020-11-22 13:01:39,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:39,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:01:39,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022025111] [2020-11-22 13:01:39,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:39,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:39,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:39,487 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 5 states. [2020-11-22 13:01:39,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:39,545 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2020-11-22 13:01:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:39,547 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-11-22 13:01:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:39,548 INFO L225 Difference]: With dead ends: 114 [2020-11-22 13:01:39,549 INFO L226 Difference]: Without dead ends: 61 [2020-11-22 13:01:39,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-22 13:01:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-11-22 13:01:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-22 13:01:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-11-22 13:01:39,562 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 56 [2020-11-22 13:01:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:39,563 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-11-22 13:01:39,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-11-22 13:01:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-22 13:01:39,565 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:39,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:39,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 13:01:39,566 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:39,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:39,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1901150683, now seen corresponding path program 1 times [2020-11-22 13:01:39,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:39,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664288301] [2020-11-22 13:01:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-22 13:01:39,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664288301] [2020-11-22 13:01:39,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:39,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:01:39,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137544373] [2020-11-22 13:01:39,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:39,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:39,654 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 6 states. [2020-11-22 13:01:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:39,684 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2020-11-22 13:01:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:39,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-11-22 13:01:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:39,687 INFO L225 Difference]: With dead ends: 117 [2020-11-22 13:01:39,687 INFO L226 Difference]: Without dead ends: 63 [2020-11-22 13:01:39,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-22 13:01:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2020-11-22 13:01:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-22 13:01:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 74 transitions. [2020-11-22 13:01:39,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 74 transitions. Word has length 65 [2020-11-22 13:01:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:39,696 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 74 transitions. [2020-11-22 13:01:39,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 74 transitions. [2020-11-22 13:01:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-22 13:01:39,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:39,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:39,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 13:01:39,697 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash -902448335, now seen corresponding path program 1 times [2020-11-22 13:01:39,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:39,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75871249] [2020-11-22 13:01:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-22 13:01:39,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75871249] [2020-11-22 13:01:39,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906513827] [2020-11-22 13:01:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 [2020-11-22 13:01:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-22 13:01:39,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-22 13:01:39,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-22 13:01:40,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635608966] [2020-11-22 13:01:40,191 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2020-11-22 13:01:40,193 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:40,194 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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) [2020-11-22 13:01:40,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:40,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2020-11-22 13:01:40,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586775467] [2020-11-22 13:01:40,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 13:01:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 13:01:40,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:40,202 INFO L87 Difference]: Start difference. First operand 58 states and 74 transitions. Second operand 7 states. [2020-11-22 13:01:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:40,293 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2020-11-22 13:01:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:40,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-11-22 13:01:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:40,298 INFO L225 Difference]: With dead ends: 124 [2020-11-22 13:01:40,298 INFO L226 Difference]: Without dead ends: 56 [2020-11-22 13:01:40,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:01:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-22 13:01:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-11-22 13:01:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-22 13:01:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-11-22 13:01:40,317 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 66 [2020-11-22 13:01:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:40,317 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-11-22 13:01:40,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 13:01:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-11-22 13:01:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-22 13:01:40,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:40,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:40,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:40,546 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash 461195803, now seen corresponding path program 1 times [2020-11-22 13:01:40,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:40,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529189673] [2020-11-22 13:01:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-22 13:01:40,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529189673] [2020-11-22 13:01:40,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:40,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:01:40,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129645707] [2020-11-22 13:01:40,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:40,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:40,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:40,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:40,626 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 6 states. [2020-11-22 13:01:40,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:40,656 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2020-11-22 13:01:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:40,657 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-11-22 13:01:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:40,658 INFO L225 Difference]: With dead ends: 113 [2020-11-22 13:01:40,658 INFO L226 Difference]: Without dead ends: 62 [2020-11-22 13:01:40,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 13:01:40,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-22 13:01:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-11-22 13:01:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-22 13:01:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-11-22 13:01:40,665 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 66 [2020-11-22 13:01:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:40,670 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-11-22 13:01:40,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-11-22 13:01:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-22 13:01:40,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:40,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:40,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 13:01:40,672 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -688837909, now seen corresponding path program 1 times [2020-11-22 13:01:40,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:40,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749766856] [2020-11-22 13:01:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-22 13:01:40,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749766856] [2020-11-22 13:01:40,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411421464] [2020-11-22 13:01:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 [2020-11-22 13:01:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 13:01:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-22 13:01:40,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-22 13:01:41,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760773086] [2020-11-22 13:01:41,297 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2020-11-22 13:01:41,297 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:41,297 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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) [2020-11-22 13:01:41,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:41,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2020-11-22 13:01:41,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663343637] [2020-11-22 13:01:41,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-22 13:01:41,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-22 13:01:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-11-22 13:01:41,299 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 13 states. [2020-11-22 13:01:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:41,535 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2020-11-22 13:01:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:01:41,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-11-22 13:01:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:41,542 INFO L225 Difference]: With dead ends: 92 [2020-11-22 13:01:41,542 INFO L226 Difference]: Without dead ends: 63 [2020-11-22 13:01:41,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-22 13:01:41,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-22 13:01:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-22 13:01:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-22 13:01:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-11-22 13:01:41,554 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 60 [2020-11-22 13:01:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:41,555 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-11-22 13:01:41,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-22 13:01:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-11-22 13:01:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-22 13:01:41,557 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:41,557 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:41,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-22 13:01:41,786 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash 624047197, now seen corresponding path program 2 times [2020-11-22 13:01:41,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:41,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576983494] [2020-11-22 13:01:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-22 13:01:41,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576983494] [2020-11-22 13:01:41,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466397980] [2020-11-22 13:01:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/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 [2020-11-22 13:01:42,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-22 13:01:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:01:42,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-22 13:01:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-22 13:01:42,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-22 13:01:43,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663783898] [2020-11-22 13:01:43,114 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2020-11-22 13:01:43,114 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:43,115 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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) [2020-11-22 13:01:43,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:43,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 20 [2020-11-22 13:01:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358171733] [2020-11-22 13:01:43,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-22 13:01:43,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:43,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-22 13:01:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-22 13:01:43,123 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 20 states. [2020-11-22 13:01:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:43,495 INFO L93 Difference]: Finished difference Result 105 states and 134 transitions. [2020-11-22 13:01:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-22 13:01:43,496 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 69 [2020-11-22 13:01:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:43,498 INFO L225 Difference]: With dead ends: 105 [2020-11-22 13:01:43,498 INFO L226 Difference]: Without dead ends: 86 [2020-11-22 13:01:43,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2020-11-22 13:01:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-22 13:01:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-11-22 13:01:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-22 13:01:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2020-11-22 13:01:43,521 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 69 [2020-11-22 13:01:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:43,522 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2020-11-22 13:01:43,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-22 13:01:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2020-11-22 13:01:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-22 13:01:43,523 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:43,523 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:43,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:43,742 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:43,742 INFO L82 PathProgramCache]: Analyzing trace with hash 954187293, now seen corresponding path program 1 times [2020-11-22 13:01:43,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:43,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342689536] [2020-11-22 13:01:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-22 13:01:43,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342689536] [2020-11-22 13:01:43,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:43,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 13:01:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668541119] [2020-11-22 13:01:43,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:01:43,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:01:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:01:43,791 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand 5 states. [2020-11-22 13:01:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:43,854 INFO L93 Difference]: Finished difference Result 147 states and 212 transitions. [2020-11-22 13:01:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:01:43,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-11-22 13:01:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:43,859 INFO L225 Difference]: With dead ends: 147 [2020-11-22 13:01:43,859 INFO L226 Difference]: Without dead ends: 75 [2020-11-22 13:01:43,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 13:01:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-22 13:01:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-22 13:01:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-22 13:01:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2020-11-22 13:01:43,872 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 76 [2020-11-22 13:01:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:43,873 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2020-11-22 13:01:43,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:01:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2020-11-22 13:01:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-22 13:01:43,875 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:43,875 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:43,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-22 13:01:43,875 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:01:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:43,876 INFO L82 PathProgramCache]: Analyzing trace with hash 225443933, now seen corresponding path program 2 times [2020-11-22 13:01:43,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:43,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228726568] [2020-11-22 13:01:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-22 13:01:44,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228726568] [2020-11-22 13:01:44,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53720316] [2020-11-22 13:01:44,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:44,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-22 13:01:44,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:01:44,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-22 13:01:44,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-22 13:01:44,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-22 13:01:45,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205875043] [2020-11-22 13:01:45,110 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2020-11-22 13:01:45,110 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:45,111 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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) [2020-11-22 13:01:45,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:45,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2020-11-22 13:01:45,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638890863] [2020-11-22 13:01:45,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-22 13:01:45,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:45,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-22 13:01:45,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-11-22 13:01:45,116 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 21 states. [2020-11-22 13:01:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:45,436 INFO L93 Difference]: Finished difference Result 118 states and 166 transitions. [2020-11-22 13:01:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-22 13:01:45,437 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-11-22 13:01:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:45,437 INFO L225 Difference]: With dead ends: 118 [2020-11-22 13:01:45,437 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 13:01:45,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-11-22 13:01:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 13:01:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 13:01:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 13:01:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 13:01:45,439 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2020-11-22 13:01:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:45,439 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 13:01:45,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-22 13:01:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 13:01:45,439 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 13:01:45,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-22 13:01:45,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 13:01:46,014 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2020-11-22 13:01:46,094 INFO L270 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (and (<= |multiple_of_#in~m| multiple_of_~m) (<= (+ |multiple_of_#in~m| 1) 0) (<= |multiple_of_#in~n| multiple_of_~n)) [2020-11-22 13:01:46,094 INFO L274 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-11-22 13:01:46,094 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-11-22 13:01:46,094 INFO L274 CegarLoopResult]: For program point multiple_ofFINAL(lines 31 45) no Hoare annotation was computed. [2020-11-22 13:01:46,094 INFO L270 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (and (< 0 multiple_of_~n) (= |multiple_of_#in~n| multiple_of_~n) (= |multiple_of_#in~m| multiple_of_~m)) [2020-11-22 13:01:46,094 INFO L274 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-11-22 13:01:46,094 INFO L277 CegarLoopResult]: At program point multiple_ofENTRY(lines 31 45) the Hoare annotation is: true [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (+ multiple_of_~n 1) 0) (= |multiple_of_#in~n| multiple_of_~n) (= |multiple_of_#in~m| multiple_of_~m)) [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point multiple_ofEXIT(lines 31 45) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L277 CegarLoopResult]: At program point multENTRY(lines 17 28) the Hoare annotation is: true [2020-11-22 13:01:46,095 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (< 1 mult_~m) (<= |mult_#in~n| mult_~n) (<= |mult_#in~m| mult_~m)) [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-11-22 13:01:46,095 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= |mult_#in~m| 0) (<= |mult_#in~m| mult_~m)) [2020-11-22 13:01:46,095 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point multFINAL(lines 17 28) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point multEXIT(lines 17 28) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L270 CegarLoopResult]: At program point L97-1(line 97) the Hoare annotation is: (and (not (= ULTIMATE.start_main_~n~0 0)) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_is_prime_~n) (<= ULTIMATE.start_main_~n~0 2)) [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point L97-4(lines 97 101) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point L91(lines 91 95) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point L85(lines 85 89) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L277 CegarLoopResult]: At program point L100(lines 76 102) the Hoare annotation is: true [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 13:01:46,096 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L270 CegarLoopResult]: At program point L53(line 53) the Hoare annotation is: (and (not (= ULTIMATE.start_main_~n~0 0)) (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_is_prime_~n)) [2020-11-22 13:01:46,097 INFO L270 CegarLoopResult]: At program point L53-1(line 53) the Hoare annotation is: (let ((.cse0 (not (= ULTIMATE.start_main_~n~0 0)))) (or (and .cse0 (= |ULTIMATE.start_is_prime_#t~ret12| 0)) (and .cse0 (<= ULTIMATE.start_main_~n~0 ULTIMATE.start_is_prime_~n) (<= ULTIMATE.start_main_~n~0 2)))) [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point L78(lines 78 82) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point L65(lines 65 72) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point is_prime_EXIT(lines 57 74) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point L64(lines 64 73) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point is_prime_FINAL(lines 57 74) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L277 CegarLoopResult]: At program point is_prime_ENTRY(lines 57 74) the Hoare annotation is: true [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point L58(lines 58 60) no Hoare annotation was computed. [2020-11-22 13:01:46,097 INFO L270 CegarLoopResult]: At program point L71(line 71) the Hoare annotation is: (and (<= 2 is_prime__~m) (<= |is_prime__#in~n| is_prime__~n) (let ((.cse2 (+ |is_prime__#in~n| is_prime__~m))) (let ((.cse0 (<= is_prime__~m |is_prime__#in~m|)) (.cse1 (<= (+ |is_prime__#in~m| is_prime__~n) .cse2))) (or (and .cse0 .cse1 (<= |is_prime__#in~m| (div |is_prime__#in~n| 2))) (and .cse0 (<= (+ |is_prime__#in~m| 3) .cse2) (<= |is_prime__#in~n| |is_prime__#in~m|) .cse1))))) [2020-11-22 13:01:46,097 INFO L274 CegarLoopResult]: For program point L71-1(line 71) no Hoare annotation was computed. [2020-11-22 13:01:46,098 INFO L270 CegarLoopResult]: At program point L68(line 68) the Hoare annotation is: (let ((.cse0 (+ |is_prime__#in~n| is_prime__~m))) (and (<= is_prime__~m |is_prime__#in~m|) (<= (+ |is_prime__#in~m| 3) .cse0) (<= (+ |is_prime__#in~m| is_prime__~n) .cse0) (<= 2 is_prime__~m) (<= |is_prime__#in~n| is_prime__~n))) [2020-11-22 13:01:46,098 INFO L274 CegarLoopResult]: For program point L68-1(line 68) no Hoare annotation was computed. [2020-11-22 13:01:46,098 INFO L274 CegarLoopResult]: For program point L68-2(lines 68 70) no Hoare annotation was computed. [2020-11-22 13:01:46,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:01:46 BoogieIcfgContainer [2020-11-22 13:01:46,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:01:46,113 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:01:46,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:01:46,113 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:01:46,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:34" (3/4) ... [2020-11-22 13:01:46,116 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 13:01:46,121 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure multiple_of [2020-11-22 13:01:46,121 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure mult [2020-11-22 13:01:46,121 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure is_prime_ [2020-11-22 13:01:46,127 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2020-11-22 13:01:46,127 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-22 13:01:46,127 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:01:46,128 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 13:01:46,187 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c02fda18-492c-4d17-b665-bd3a66becc0c/bin/utaipan/witness.graphml [2020-11-22 13:01:46,188 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:01:46,188 INFO L168 Benchmark]: Toolchain (without parser) took 12043.89 ms. Allocated memory was 96.5 MB in the beginning and 207.6 MB in the end (delta: 111.1 MB). Free memory was 65.4 MB in the beginning and 100.8 MB in the end (delta: -35.4 MB). Peak memory consumption was 75.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:46,189 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 73.4 MB. Free memory was 30.9 MB in the beginning and 30.8 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:46,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.22 ms. Allocated memory is still 96.5 MB. Free memory was 65.1 MB in the beginning and 74.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:46,189 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.15 ms. Allocated memory is still 96.5 MB. Free memory was 74.0 MB in the beginning and 72.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:46,190 INFO L168 Benchmark]: Boogie Preprocessor took 23.73 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 71.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:46,190 INFO L168 Benchmark]: RCFGBuilder took 526.57 ms. Allocated memory is still 96.5 MB. Free memory was 71.3 MB in the beginning and 50.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:46,190 INFO L168 Benchmark]: TraceAbstraction took 11117.89 ms. Allocated memory was 96.5 MB in the beginning and 207.6 MB in the end (delta: 111.1 MB). Free memory was 50.3 MB in the beginning and 105.0 MB in the end (delta: -54.7 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:46,191 INFO L168 Benchmark]: Witness Printer took 74.98 ms. Allocated memory is still 207.6 MB. Free memory was 105.0 MB in the beginning and 100.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:46,193 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 73.4 MB. Free memory was 30.9 MB in the beginning and 30.8 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 262.22 ms. Allocated memory is still 96.5 MB. Free memory was 65.1 MB in the beginning and 74.0 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.15 ms. Allocated memory is still 96.5 MB. Free memory was 74.0 MB in the beginning and 72.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.73 ms. Allocated memory is still 96.5 MB. Free memory was 72.8 MB in the beginning and 71.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 526.57 ms. Allocated memory is still 96.5 MB. Free memory was 71.3 MB in the beginning and 50.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11117.89 ms. Allocated memory was 96.5 MB in the beginning and 207.6 MB in the end (delta: 111.1 MB). Free memory was 50.3 MB in the beginning and 105.0 MB in the end (delta: -54.7 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. * Witness Printer took 74.98 ms. Allocated memory is still 207.6 MB. Free memory was 105.0 MB in the beginning and 100.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 76]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: (!(n == 0) && aux-is_prime_(n, n - 1)-aux == 0) || ((!(n == 0) && n <= n) && n <= 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.5s, OverallIterations: 17, TraceHistogramMax: 5, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 867 SDtfs, 373 SDslu, 3310 SDs, 0 SdLazy, 1164 SolverSat, 140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 928 GetRequests, 734 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 34 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 256 PreInvPairs, 304 NumberOfFragments, 163 HoareAnnotationTreeSize, 256 FomulaSimplifications, 402 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 14 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 1207 NumberOfCodeBlocks, 1198 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1566 ConstructedInterpolants, 0 QuantifiedInterpolants, 215017 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1262 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 31 InterpolantComputations, 11 PerfectInterpolantSequences, 530/715 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...