./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label49.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_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label49.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/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 c7e59aea7a3c4214c2070bc3dc105ace2c6879c8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:37:42,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:37:42,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:37:42,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:37:42,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:37:42,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:37:42,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:37:42,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:37:42,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:37:42,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:37:42,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:37:42,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:37:42,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:37:42,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:37:42,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:37:42,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:37:42,960 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:37:42,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:37:42,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:37:42,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:37:42,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:37:42,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:37:42,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:37:42,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:37:42,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:37:42,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:37:42,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:37:43,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:37:43,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:37:43,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:37:43,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:37:43,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:37:43,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:37:43,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:37:43,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:37:43,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:37:43,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:37:43,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:37:43,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:37:43,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:37:43,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:37:43,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:37:43,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:37:43,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:37:43,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:37:43,074 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:37:43,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:37:43,075 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:37:43,075 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:37:43,076 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:37:43,076 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:37:43,076 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:37:43,077 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:37:43,078 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:37:43,078 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:37:43,079 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:37:43,079 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:37:43,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:37:43,080 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:37:43,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:37:43,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:37:43,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:37:43,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:37:43,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:37:43,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:37:43,082 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:37:43,082 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:37:43,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:37:43,083 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:37:43,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:37:43,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:37:43,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:37:43,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:37:43,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:43,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:37:43,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:37:43,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:37:43,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:37:43,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:37:43,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:37:43,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:37:43,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:37:43,089 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_a9b2880a-3528-4322-ac3e-1dd6067fdb43/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e59aea7a3c4214c2070bc3dc105ace2c6879c8 [2020-11-28 07:37:43,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:37:43,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:37:43,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:37:43,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:37:43,510 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:37:43,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label49.c [2020-11-28 07:37:43,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/data/2a3954e76/d8d2869386054e6a8368cdb592e8da85/FLAG4d5aa6cb9 [2020-11-28 07:37:44,406 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:37:44,406 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/sv-benchmarks/c/eca-rers2012/Problem01_label49.c [2020-11-28 07:37:44,429 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/data/2a3954e76/d8d2869386054e6a8368cdb592e8da85/FLAG4d5aa6cb9 [2020-11-28 07:37:44,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/data/2a3954e76/d8d2869386054e6a8368cdb592e8da85 [2020-11-28 07:37:44,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:37:44,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:37:44,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:44,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:37:44,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:37:44,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43345cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:44, skipping insertion in model container [2020-11-28 07:37:44,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:44" (1/1) ... [2020-11-28 07:37:44,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:37:44,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:37:45,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:45,212 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:37:45,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:45,457 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:37:45,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45 WrapperNode [2020-11-28 07:37:45,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:45,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:45,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:37:45,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:37:45,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:45,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:37:45,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:37:45,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:37:45,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... [2020-11-28 07:37:45,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:37:45,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:37:45,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:37:45,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:37:45,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/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 [2020-11-28 07:37:45,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:37:45,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:37:45,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:37:45,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:37:48,969 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:37:48,969 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:37:48,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:48 BoogieIcfgContainer [2020-11-28 07:37:48,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:37:48,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:37:48,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:37:48,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:37:48,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:37:44" (1/3) ... [2020-11-28 07:37:48,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f83903a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:48, skipping insertion in model container [2020-11-28 07:37:48,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:45" (2/3) ... [2020-11-28 07:37:48,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f83903a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:48, skipping insertion in model container [2020-11-28 07:37:48,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:48" (3/3) ... [2020-11-28 07:37:48,987 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label49.c [2020-11-28 07:37:49,001 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:37:49,007 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:37:49,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:37:49,065 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:37:49,066 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:37:49,066 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:37:49,066 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:37:49,066 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:37:49,067 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:37:49,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:37:49,067 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:37:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:37:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:37:49,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:49,104 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:49,104 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:49,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1520709229, now seen corresponding path program 1 times [2020-11-28 07:37:49,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:49,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553598224] [2020-11-28 07:37:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:49,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553598224] [2020-11-28 07:37:49,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:49,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986489125] [2020-11-28 07:37:49,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:49,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:49,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:49,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:49,712 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:37:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:50,483 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:37:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:50,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:37:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:50,509 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:37:50,514 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:37:50,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:50,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:37:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:37:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:37:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 271 transitions. [2020-11-28 07:37:50,625 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 271 transitions. Word has length 71 [2020-11-28 07:37:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:50,627 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 271 transitions. [2020-11-28 07:37:50,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 271 transitions. [2020-11-28 07:37:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 07:37:50,635 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:50,635 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:50,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:37:50,636 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1350086719, now seen corresponding path program 1 times [2020-11-28 07:37:50,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:50,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301239218] [2020-11-28 07:37:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:50,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301239218] [2020-11-28 07:37:50,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:50,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:50,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141201483] [2020-11-28 07:37:50,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:50,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:50,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:50,730 INFO L87 Difference]: Start difference. First operand 145 states and 271 transitions. Second operand 3 states. [2020-11-28 07:37:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:51,368 INFO L93 Difference]: Finished difference Result 433 states and 811 transitions. [2020-11-28 07:37:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:51,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-11-28 07:37:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:51,372 INFO L225 Difference]: With dead ends: 433 [2020-11-28 07:37:51,373 INFO L226 Difference]: Without dead ends: 289 [2020-11-28 07:37:51,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-11-28 07:37:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2020-11-28 07:37:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:37:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 504 transitions. [2020-11-28 07:37:51,399 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 504 transitions. Word has length 76 [2020-11-28 07:37:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:51,400 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 504 transitions. [2020-11-28 07:37:51,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 504 transitions. [2020-11-28 07:37:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-11-28 07:37:51,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:51,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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] [2020-11-28 07:37:51,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:37:51,405 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:51,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1863729326, now seen corresponding path program 1 times [2020-11-28 07:37:51,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153387999] [2020-11-28 07:37:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:51,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153387999] [2020-11-28 07:37:51,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:51,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:51,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820631687] [2020-11-28 07:37:51,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:51,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:51,521 INFO L87 Difference]: Start difference. First operand 287 states and 504 transitions. Second operand 4 states. [2020-11-28 07:37:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:52,450 INFO L93 Difference]: Finished difference Result 999 states and 1753 transitions. [2020-11-28 07:37:52,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:52,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-11-28 07:37:52,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:52,459 INFO L225 Difference]: With dead ends: 999 [2020-11-28 07:37:52,459 INFO L226 Difference]: Without dead ends: 713 [2020-11-28 07:37:52,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-11-28 07:37:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2020-11-28 07:37:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:37:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1106 transitions. [2020-11-28 07:37:52,538 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1106 transitions. Word has length 83 [2020-11-28 07:37:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:52,539 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1106 transitions. [2020-11-28 07:37:52,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1106 transitions. [2020-11-28 07:37:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:37:52,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:52,553 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-11-28 07:37:52,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:37:52,553 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:52,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:52,554 INFO L82 PathProgramCache]: Analyzing trace with hash 228741672, now seen corresponding path program 1 times [2020-11-28 07:37:52,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:52,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741657106] [2020-11-28 07:37:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741657106] [2020-11-28 07:37:52,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:52,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:52,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088017354] [2020-11-28 07:37:52,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:52,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:52,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:52,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:52,688 INFO L87 Difference]: Start difference. First operand 713 states and 1106 transitions. Second operand 3 states. [2020-11-28 07:37:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:53,341 INFO L93 Difference]: Finished difference Result 1780 states and 2693 transitions. [2020-11-28 07:37:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:53,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-11-28 07:37:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:53,350 INFO L225 Difference]: With dead ends: 1780 [2020-11-28 07:37:53,351 INFO L226 Difference]: Without dead ends: 1068 [2020-11-28 07:37:53,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-28 07:37:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 997. [2020-11-28 07:37:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:37:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1445 transitions. [2020-11-28 07:37:53,402 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1445 transitions. Word has length 86 [2020-11-28 07:37:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:53,404 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1445 transitions. [2020-11-28 07:37:53,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:53,404 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1445 transitions. [2020-11-28 07:37:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-11-28 07:37:53,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:53,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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] [2020-11-28 07:37:53,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:37:53,413 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash -222278628, now seen corresponding path program 1 times [2020-11-28 07:37:53,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:53,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780233287] [2020-11-28 07:37:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 07:37:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780233287] [2020-11-28 07:37:53,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:53,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:53,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668697008] [2020-11-28 07:37:53,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:53,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:53,520 INFO L87 Difference]: Start difference. First operand 997 states and 1445 transitions. Second operand 3 states. [2020-11-28 07:37:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:54,121 INFO L93 Difference]: Finished difference Result 2277 states and 3385 transitions. [2020-11-28 07:37:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:54,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-11-28 07:37:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:54,130 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:37:54,131 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:37:54,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:37:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-11-28 07:37:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-28 07:37:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1613 transitions. [2020-11-28 07:37:54,190 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1613 transitions. Word has length 87 [2020-11-28 07:37:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:54,191 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1613 transitions. [2020-11-28 07:37:54,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1613 transitions. [2020-11-28 07:37:54,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-28 07:37:54,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:54,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:54,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:37:54,198 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:54,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:54,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2092178514, now seen corresponding path program 1 times [2020-11-28 07:37:54,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:54,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906342771] [2020-11-28 07:37:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:54,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906342771] [2020-11-28 07:37:54,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:54,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:54,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315349521] [2020-11-28 07:37:54,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:54,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:54,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:54,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:54,328 INFO L87 Difference]: Start difference. First operand 1281 states and 1613 transitions. Second operand 4 states. [2020-11-28 07:37:55,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:55,089 INFO L93 Difference]: Finished difference Result 2490 states and 3151 transitions. [2020-11-28 07:37:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:55,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-11-28 07:37:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:55,098 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:37:55,098 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:37:55,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:37:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2020-11-28 07:37:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-28 07:37:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1560 transitions. [2020-11-28 07:37:55,138 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1560 transitions. Word has length 90 [2020-11-28 07:37:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:55,139 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1560 transitions. [2020-11-28 07:37:55,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1560 transitions. [2020-11-28 07:37:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-11-28 07:37:55,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:55,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:55,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:37:55,149 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:55,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1737640079, now seen corresponding path program 1 times [2020-11-28 07:37:55,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:55,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811082616] [2020-11-28 07:37:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:55,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811082616] [2020-11-28 07:37:55,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:55,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:55,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210059022] [2020-11-28 07:37:55,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:55,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:55,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:55,309 INFO L87 Difference]: Start difference. First operand 1281 states and 1560 transitions. Second operand 3 states. [2020-11-28 07:37:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:55,822 INFO L93 Difference]: Finished difference Result 2490 states and 3045 transitions. [2020-11-28 07:37:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:55,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-11-28 07:37:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:55,837 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:37:55,837 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:37:55,840 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 [2020-11-28 07:37:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:37:55,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 997. [2020-11-28 07:37:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:37:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1159 transitions. [2020-11-28 07:37:55,885 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1159 transitions. Word has length 108 [2020-11-28 07:37:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:55,886 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1159 transitions. [2020-11-28 07:37:55,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1159 transitions. [2020-11-28 07:37:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-28 07:37:55,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:55,891 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:37:55,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:37:55,891 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:55,892 INFO L82 PathProgramCache]: Analyzing trace with hash 445241428, now seen corresponding path program 1 times [2020-11-28 07:37:55,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:55,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095743775] [2020-11-28 07:37:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:56,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095743775] [2020-11-28 07:37:56,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:56,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:56,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750731280] [2020-11-28 07:37:56,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:56,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:56,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:56,080 INFO L87 Difference]: Start difference. First operand 997 states and 1159 transitions. Second operand 3 states. [2020-11-28 07:37:56,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:56,580 INFO L93 Difference]: Finished difference Result 2206 states and 2586 transitions. [2020-11-28 07:37:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:56,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 155 [2020-11-28 07:37:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:56,602 INFO L225 Difference]: With dead ends: 2206 [2020-11-28 07:37:56,602 INFO L226 Difference]: Without dead ends: 1281 [2020-11-28 07:37:56,604 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 [2020-11-28 07:37:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-28 07:37:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1210. [2020-11-28 07:37:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:37:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1386 transitions. [2020-11-28 07:37:56,646 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1386 transitions. Word has length 155 [2020-11-28 07:37:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:56,646 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1386 transitions. [2020-11-28 07:37:56,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1386 transitions. [2020-11-28 07:37:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-11-28 07:37:56,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:56,652 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2020-11-28 07:37:56,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:37:56,652 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:56,653 INFO L82 PathProgramCache]: Analyzing trace with hash 309133834, now seen corresponding path program 1 times [2020-11-28 07:37:56,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:56,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71623788] [2020-11-28 07:37:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-28 07:37:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71623788] [2020-11-28 07:37:56,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:56,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:56,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560008095] [2020-11-28 07:37:56,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:56,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:56,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:56,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:37:56,818 INFO L87 Difference]: Start difference. First operand 1210 states and 1386 transitions. Second operand 3 states. [2020-11-28 07:37:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:57,230 INFO L93 Difference]: Finished difference Result 2632 states and 3040 transitions. [2020-11-28 07:37:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:57,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2020-11-28 07:37:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:57,239 INFO L225 Difference]: With dead ends: 2632 [2020-11-28 07:37:57,239 INFO L226 Difference]: Without dead ends: 1494 [2020-11-28 07:37:57,241 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 [2020-11-28 07:37:57,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-11-28 07:37:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2020-11-28 07:37:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-11-28 07:37:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1455 transitions. [2020-11-28 07:37:57,283 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1455 transitions. Word has length 158 [2020-11-28 07:37:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:57,284 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1455 transitions. [2020-11-28 07:37:57,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1455 transitions. [2020-11-28 07:37:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-11-28 07:37:57,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:57,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:57,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:37:57,290 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2043502029, now seen corresponding path program 1 times [2020-11-28 07:37:57,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:57,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937340762] [2020-11-28 07:37:57,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 113 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:57,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937340762] [2020-11-28 07:37:57,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348838449] [2020-11-28 07:37:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/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 [2020-11-28 07:37:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:37:57,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-11-28 07:37:57,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-11-28 07:37:58,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:37:58,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5] total 6 [2020-11-28 07:37:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134290894] [2020-11-28 07:37:58,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:58,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:58,022 INFO L87 Difference]: Start difference. First operand 1281 states and 1455 transitions. Second operand 3 states. [2020-11-28 07:37:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:58,466 INFO L93 Difference]: Finished difference Result 2916 states and 3349 transitions. [2020-11-28 07:37:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:58,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 168 [2020-11-28 07:37:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:58,475 INFO L225 Difference]: With dead ends: 2916 [2020-11-28 07:37:58,476 INFO L226 Difference]: Without dead ends: 1707 [2020-11-28 07:37:58,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2020-11-28 07:37:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 997. [2020-11-28 07:37:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-11-28 07:37:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1149 transitions. [2020-11-28 07:37:58,514 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1149 transitions. Word has length 168 [2020-11-28 07:37:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:58,514 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1149 transitions. [2020-11-28 07:37:58,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:37:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1149 transitions. [2020-11-28 07:37:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-11-28 07:37:58,519 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:58,519 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2020-11-28 07:37:58,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-28 07:37:58,745 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:37:58,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1489148638, now seen corresponding path program 1 times [2020-11-28 07:37:58,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:58,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387705683] [2020-11-28 07:37:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 255 proven. 35 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-11-28 07:37:59,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387705683] [2020-11-28 07:37:59,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92611603] [2020-11-28 07:37:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/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 [2020-11-28 07:37:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:37:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:37:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-11-28 07:37:59,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:37:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2020-11-28 07:37:59,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:37:59,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:37:59,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623207796] [2020-11-28 07:37:59,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:37:59,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:59,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:37:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:59,435 INFO L87 Difference]: Start difference. First operand 997 states and 1149 transitions. Second operand 3 states. [2020-11-28 07:37:59,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:59,969 INFO L93 Difference]: Finished difference Result 2277 states and 2650 transitions. [2020-11-28 07:37:59,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:37:59,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2020-11-28 07:37:59,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:59,976 INFO L225 Difference]: With dead ends: 2277 [2020-11-28 07:37:59,976 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:37:59,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:59,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:38:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2020-11-28 07:38:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:38:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1410 transitions. [2020-11-28 07:38:00,017 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1410 transitions. Word has length 256 [2020-11-28 07:38:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:00,018 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1410 transitions. [2020-11-28 07:38:00,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:38:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1410 transitions. [2020-11-28 07:38:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-11-28 07:38:00,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:00,025 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:00,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:38:00,242 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:00,242 INFO L82 PathProgramCache]: Analyzing trace with hash -882584256, now seen corresponding path program 1 times [2020-11-28 07:38:00,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:00,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830395166] [2020-11-28 07:38:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 270 proven. 114 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:38:00,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830395166] [2020-11-28 07:38:00,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313793567] [2020-11-28 07:38:00,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/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 [2020-11-28 07:38:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:01,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:38:01,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-11-28 07:38:01,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-11-28 07:38:01,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:38:01,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:38:01,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029970730] [2020-11-28 07:38:01,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:38:01,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:38:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:38:01,350 INFO L87 Difference]: Start difference. First operand 1210 states and 1410 transitions. Second operand 3 states. [2020-11-28 07:38:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:01,753 INFO L93 Difference]: Finished difference Result 2559 states and 3006 transitions. [2020-11-28 07:38:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:38:01,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2020-11-28 07:38:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:01,754 INFO L225 Difference]: With dead ends: 2559 [2020-11-28 07:38:01,754 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:38:01,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 528 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:38:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:38:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:38:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:38:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:38:01,758 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 265 [2020-11-28 07:38:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:01,758 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:38:01,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:38:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:38:01,759 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:38:01,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 07:38:01,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:38:02,303 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-11-28 07:38:02,494 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:38:02,500 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L503-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L506-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:38:02,501 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L507(line 507) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:38:02,502 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:38:02,503 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (<= ~a16~0 4)) (.cse4 (<= 15 ~a8~0)) (.cse5 (= ~a21~0 1)) (.cse7 (= ~a16~0 6)) (.cse3 (<= ~a16~0 5)) (.cse6 (= ~a20~0 1)) (.cse1 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2) (and .cse3 (not (= ~a7~0 1)) .cse4 .cse1) (and .cse5 .cse0 .cse6 .cse1) (and .cse7 .cse4 .cse1) (and .cse5 .cse7 (<= ~a7~0 0) .cse6 .cse1 .cse2) (and .cse3 .cse6 .cse1 .cse2) (= ~a17~0 0))) [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:38:02,504 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:38:02,505 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:38:02,506 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:38:02,506 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:38:02,506 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (<= ~a16~0 4)) (.cse4 (<= 15 ~a8~0)) (.cse5 (= ~a21~0 1)) (.cse7 (= ~a16~0 6)) (.cse3 (<= ~a16~0 5)) (.cse6 (= ~a20~0 1)) (.cse1 (= ~a17~0 1)) (.cse2 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2) (and .cse3 (not (= ~a7~0 1)) .cse4 .cse1) (and .cse5 .cse0 .cse6 .cse1) (and .cse7 .cse4 .cse1) (and .cse5 .cse7 (<= ~a7~0 0) .cse6 .cse1 .cse2) (and .cse3 .cse6 .cse1 .cse2) (= ~a17~0 0))) [2020-11-28 07:38:02,506 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:38:02,506 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:38:02,506 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:38:02,506 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:38:02,506 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:38:02,507 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:38:02,507 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:38:02,507 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:38:02,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:02 BoogieIcfgContainer [2020-11-28 07:38:02,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:02,547 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:02,548 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:02,548 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:02,549 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:48" (3/4) ... [2020-11-28 07:38:02,552 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:38:02,583 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:38:02,584 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:38:02,586 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:38:02,588 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:38:02,747 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a9b2880a-3528-4322-ac3e-1dd6067fdb43/bin/utaipan/witness.graphml [2020-11-28 07:38:02,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:02,748 INFO L168 Benchmark]: Toolchain (without parser) took 18117.91 ms. Allocated memory was 117.4 MB in the beginning and 308.3 MB in the end (delta: 190.8 MB). Free memory was 84.3 MB in the beginning and 116.3 MB in the end (delta: -32.0 MB). Peak memory consumption was 158.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:02,749 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 52.4 MB in the beginning and 52.4 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:02,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 825.94 ms. Allocated memory is still 117.4 MB. Free memory was 84.3 MB in the beginning and 77.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:02,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 119.45 ms. Allocated memory is still 117.4 MB. Free memory was 77.1 MB in the beginning and 71.2 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:02,750 INFO L168 Benchmark]: Boogie Preprocessor took 75.13 ms. Allocated memory is still 117.4 MB. Free memory was 71.2 MB in the beginning and 67.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:02,750 INFO L168 Benchmark]: RCFGBuilder took 3318.74 ms. Allocated memory was 117.4 MB in the beginning and 146.8 MB in the end (delta: 29.4 MB). Free memory was 67.0 MB in the beginning and 89.1 MB in the end (delta: -22.0 MB). Peak memory consumption was 52.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:02,751 INFO L168 Benchmark]: TraceAbstraction took 13570.51 ms. Allocated memory was 146.8 MB in the beginning and 308.3 MB in the end (delta: 161.5 MB). Free memory was 89.1 MB in the beginning and 132.0 MB in the end (delta: -43.0 MB). Peak memory consumption was 119.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:02,751 INFO L168 Benchmark]: Witness Printer took 200.36 ms. Allocated memory is still 308.3 MB. Free memory was 132.0 MB in the beginning and 116.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:02,753 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 52.4 MB in the beginning and 52.4 MB in the end (delta: 24.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 825.94 ms. Allocated memory is still 117.4 MB. Free memory was 84.3 MB in the beginning and 77.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 119.45 ms. Allocated memory is still 117.4 MB. Free memory was 77.1 MB in the beginning and 71.2 MB in the end (delta: 5.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.13 ms. Allocated memory is still 117.4 MB. Free memory was 71.2 MB in the beginning and 67.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 3318.74 ms. Allocated memory was 117.4 MB in the beginning and 146.8 MB in the end (delta: 29.4 MB). Free memory was 67.0 MB in the beginning and 89.1 MB in the end (delta: -22.0 MB). Peak memory consumption was 52.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13570.51 ms. Allocated memory was 146.8 MB in the beginning and 308.3 MB in the end (delta: 161.5 MB). Free memory was 89.1 MB in the beginning and 132.0 MB in the end (delta: -43.0 MB). Peak memory consumption was 119.6 MB. Max. memory is 16.1 GB. * Witness Printer took 200.36 ms. Allocated memory is still 308.3 MB. Free memory was 132.0 MB in the beginning and 116.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((a16 <= 4 && a17 == 1) && a8 <= 13) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 == 6 && 15 <= a8) && a17 == 1)) || (((((a21 == 1 && a16 == 6) && a7 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || (((a16 <= 5 && a20 == 1) && a17 == 1) && a8 <= 13)) || a17 == 0 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: (((((((a16 <= 4 && a17 == 1) && a8 <= 13) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a21 == 1 && a16 <= 4) && a20 == 1) && a17 == 1)) || ((a16 == 6 && 15 <= a8) && a17 == 1)) || (((((a21 == 1 && a16 == 6) && a7 <= 0) && a20 == 1) && a17 == 1) && a8 <= 13)) || (((a16 <= 5 && a20 == 1) && a17 == 1) && a8 <= 13)) || a17 == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 12, TraceHistogramMax: 7, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 596 SDtfs, 728 SDslu, 50 SDs, 0 SdLazy, 2659 SolverSat, 662 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1411 GetRequests, 1382 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1281occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 12 MinimizatonAttempts, 1493 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 167 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2782 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 132 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 2292 NumberOfCodeBlocks, 2292 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2963 ConstructedInterpolants, 0 QuantifiedInterpolants, 2153112 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1469 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 3085/3269 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...