./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label09.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_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label09.c -s /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/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 c3bec4a19ad486e7769a1ae863b766e21c94d89f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 07:44:34,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:44:34,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:44:34,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:44:34,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:44:34,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:44:34,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:44:34,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:44:34,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:44:34,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:44:34,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:44:34,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:44:34,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:44:34,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:44:34,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:44:34,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:44:34,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:44:34,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:44:34,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:44:34,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:44:34,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:44:34,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:44:34,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:44:34,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:44:34,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:44:34,407 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:44:34,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:44:34,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:44:34,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:44:34,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:44:34,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:44:34,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:44:34,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:44:34,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:44:34,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:44:34,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:44:34,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:44:34,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:44:34,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:44:34,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:44:34,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:44:34,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:44:34,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:44:34,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:44:34,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:44:34,473 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:44:34,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:44:34,473 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:44:34,474 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:44:34,474 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:44:34,474 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:44:34,474 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:44:34,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:44:34,476 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:44:34,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:44:34,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:44:34,477 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:44:34,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:44:34,478 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:44:34,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:44:34,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:44:34,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:44:34,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:44:34,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:44:34,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:44:34,479 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:44:34,480 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:44:34,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:44:34,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:44:34,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:44:34,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:44:34,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:44:34,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:44:34,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:44:34,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:44:34,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:44:34,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:44:34,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:44:34,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:44:34,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:44:34,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:44:34,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:44:34,485 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_65af184a-9737-4b15-abfe-936bc49ca36b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3bec4a19ad486e7769a1ae863b766e21c94d89f [2020-11-28 07:44:34,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:44:34,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:44:34,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:44:34,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:44:34,828 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:44:34,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label09.c [2020-11-28 07:44:34,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/data/a2d26f8ee/b0bc478457c04df59b61af43c910b175/FLAGc3e814549 [2020-11-28 07:44:35,604 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:44:35,605 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/sv-benchmarks/c/eca-rers2012/Problem01_label09.c [2020-11-28 07:44:35,625 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/data/a2d26f8ee/b0bc478457c04df59b61af43c910b175/FLAGc3e814549 [2020-11-28 07:44:35,843 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/data/a2d26f8ee/b0bc478457c04df59b61af43c910b175 [2020-11-28 07:44:35,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:44:35,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:44:35,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:44:35,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:44:35,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:44:35,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:44:35" (1/1) ... [2020-11-28 07:44:35,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e4a4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:35, skipping insertion in model container [2020-11-28 07:44:35,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:44:35" (1/1) ... [2020-11-28 07:44:35,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:44:35,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:44:36,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:44:36,462 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:44:36,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:44:36,616 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:44:36,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36 WrapperNode [2020-11-28 07:44:36,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:44:36,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:44:36,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:44:36,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:44:36,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:44:36,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:44:36,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:44:36,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:44:36,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,724 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... [2020-11-28 07:44:36,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:44:36,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:44:36,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:44:36,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:44:36,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/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 07:44:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:44:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:44:36,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:44:36,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:44:39,372 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:44:39,373 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:44:39,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:44:39 BoogieIcfgContainer [2020-11-28 07:44:39,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:44:39,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:44:39,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:44:39,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:44:39,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:44:35" (1/3) ... [2020-11-28 07:44:39,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c5623f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:44:39, skipping insertion in model container [2020-11-28 07:44:39,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:44:36" (2/3) ... [2020-11-28 07:44:39,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c5623f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:44:39, skipping insertion in model container [2020-11-28 07:44:39,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:44:39" (3/3) ... [2020-11-28 07:44:39,390 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label09.c [2020-11-28 07:44:39,402 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:44:39,407 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:44:39,419 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:44:39,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:44:39,454 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:44:39,454 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:44:39,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:44:39,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:44:39,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:44:39,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:44:39,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:44:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-11-28 07:44:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-28 07:44:39,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:39,486 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 07:44:39,486 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:39,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712045, now seen corresponding path program 1 times [2020-11-28 07:44:39,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:39,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143707336] [2020-11-28 07:44:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:39,891 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 07:44:39,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143707336] [2020-11-28 07:44:39,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:39,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:44:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16853349] [2020-11-28 07:44:39,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:39,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:39,916 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-11-28 07:44:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:40,518 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-11-28 07:44:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:40,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-11-28 07:44:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:40,531 INFO L225 Difference]: With dead ends: 224 [2020-11-28 07:44:40,535 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 07:44:40,540 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 07:44:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 07:44:40,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-11-28 07:44:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-28 07:44:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2020-11-28 07:44:40,613 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2020-11-28 07:44:40,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:40,614 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2020-11-28 07:44:40,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:40,615 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2020-11-28 07:44:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-28 07:44:40,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:40,621 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 07:44:40,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:44:40,622 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:40,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1350083903, now seen corresponding path program 1 times [2020-11-28 07:44:40,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:40,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476209643] [2020-11-28 07:44:40,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:40,725 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 07:44:40,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476209643] [2020-11-28 07:44:40,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:40,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:44:40,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453538369] [2020-11-28 07:44:40,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:40,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:40,731 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2020-11-28 07:44:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:41,252 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2020-11-28 07:44:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:41,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-11-28 07:44:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:41,256 INFO L225 Difference]: With dead ends: 431 [2020-11-28 07:44:41,256 INFO L226 Difference]: Without dead ends: 287 [2020-11-28 07:44:41,258 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 07:44:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-11-28 07:44:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-11-28 07:44:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 07:44:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 479 transitions. [2020-11-28 07:44:41,274 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 479 transitions. Word has length 76 [2020-11-28 07:44:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:41,275 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 479 transitions. [2020-11-28 07:44:41,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 479 transitions. [2020-11-28 07:44:41,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-28 07:44:41,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:41,282 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2020-11-28 07:44:41,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:44:41,282 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:41,283 INFO L82 PathProgramCache]: Analyzing trace with hash 24309890, now seen corresponding path program 1 times [2020-11-28 07:44:41,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:41,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381449534] [2020-11-28 07:44:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 07:44:41,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381449534] [2020-11-28 07:44:41,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:41,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:44:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048769863] [2020-11-28 07:44:41,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:41,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:41,375 INFO L87 Difference]: Start difference. First operand 287 states and 479 transitions. Second operand 3 states. [2020-11-28 07:44:41,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:41,860 INFO L93 Difference]: Finished difference Result 857 states and 1434 transitions. [2020-11-28 07:44:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:41,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-11-28 07:44:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:41,866 INFO L225 Difference]: With dead ends: 857 [2020-11-28 07:44:41,866 INFO L226 Difference]: Without dead ends: 571 [2020-11-28 07:44:41,868 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 07:44:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-11-28 07:44:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2020-11-28 07:44:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-28 07:44:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 883 transitions. [2020-11-28 07:44:41,908 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 883 transitions. Word has length 86 [2020-11-28 07:44:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:41,908 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 883 transitions. [2020-11-28 07:44:41,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 883 transitions. [2020-11-28 07:44:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-28 07:44:41,915 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:41,920 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2020-11-28 07:44:41,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:44:41,921 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1345541042, now seen corresponding path program 1 times [2020-11-28 07:44:41,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:41,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589675419] [2020-11-28 07:44:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 07:44:42,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589675419] [2020-11-28 07:44:42,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:42,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646567316] [2020-11-28 07:44:42,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:42,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:42,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:42,010 INFO L87 Difference]: Start difference. First operand 571 states and 883 transitions. Second operand 3 states. [2020-11-28 07:44:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:42,502 INFO L93 Difference]: Finished difference Result 1567 states and 2438 transitions. [2020-11-28 07:44:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:42,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-11-28 07:44:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:42,508 INFO L225 Difference]: With dead ends: 1567 [2020-11-28 07:44:42,509 INFO L226 Difference]: Without dead ends: 997 [2020-11-28 07:44:42,510 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 07:44:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-11-28 07:44:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 713. [2020-11-28 07:44:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2020-11-28 07:44:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1044 transitions. [2020-11-28 07:44:42,554 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1044 transitions. Word has length 91 [2020-11-28 07:44:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:42,556 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 1044 transitions. [2020-11-28 07:44:42,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1044 transitions. [2020-11-28 07:44:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-28 07:44:42,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:42,564 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:44:42,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:44:42,565 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:42,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:42,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1848421864, now seen corresponding path program 1 times [2020-11-28 07:44:42,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:42,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719170250] [2020-11-28 07:44:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:44:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719170250] [2020-11-28 07:44:42,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:42,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:42,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893348547] [2020-11-28 07:44:42,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:42,662 INFO L87 Difference]: Start difference. First operand 713 states and 1044 transitions. Second operand 3 states. [2020-11-28 07:44:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:43,223 INFO L93 Difference]: Finished difference Result 2064 states and 3033 transitions. [2020-11-28 07:44:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:43,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-11-28 07:44:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:43,230 INFO L225 Difference]: With dead ends: 2064 [2020-11-28 07:44:43,230 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:44:43,232 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 07:44:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:44:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1139. [2020-11-28 07:44:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:44:43,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1607 transitions. [2020-11-28 07:44:43,277 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1607 transitions. Word has length 94 [2020-11-28 07:44:43,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:43,277 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1607 transitions. [2020-11-28 07:44:43,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:43,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1607 transitions. [2020-11-28 07:44:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-11-28 07:44:43,280 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:43,281 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-11-28 07:44:43,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:44:43,281 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash 114934542, now seen corresponding path program 1 times [2020-11-28 07:44:43,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:43,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116602413] [2020-11-28 07:44:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:44:43,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116602413] [2020-11-28 07:44:43,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:43,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:44:43,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990307246] [2020-11-28 07:44:43,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:43,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:43,375 INFO L87 Difference]: Start difference. First operand 1139 states and 1607 transitions. Second operand 3 states. [2020-11-28 07:44:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:43,878 INFO L93 Difference]: Finished difference Result 2419 states and 3373 transitions. [2020-11-28 07:44:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:43,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-11-28 07:44:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:43,885 INFO L225 Difference]: With dead ends: 2419 [2020-11-28 07:44:43,885 INFO L226 Difference]: Without dead ends: 1210 [2020-11-28 07:44:43,887 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 07:44:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2020-11-28 07:44:43,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1210. [2020-11-28 07:44:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-11-28 07:44:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1472 transitions. [2020-11-28 07:44:43,919 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1472 transitions. Word has length 98 [2020-11-28 07:44:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:43,919 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1472 transitions. [2020-11-28 07:44:43,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1472 transitions. [2020-11-28 07:44:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-28 07:44:43,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:43,931 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 07:44:43,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:44:43,931 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:43,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1447508884, now seen corresponding path program 1 times [2020-11-28 07:44:43,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:43,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405188964] [2020-11-28 07:44:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-11-28 07:44:44,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405188964] [2020-11-28 07:44:44,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:44,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:44,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670368598] [2020-11-28 07:44:44,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:44:44,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:44:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:44:44,021 INFO L87 Difference]: Start difference. First operand 1210 states and 1472 transitions. Second operand 4 states. [2020-11-28 07:44:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:44,566 INFO L93 Difference]: Finished difference Result 2490 states and 3044 transitions. [2020-11-28 07:44:44,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:44:44,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-11-28 07:44:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:44,574 INFO L225 Difference]: With dead ends: 2490 [2020-11-28 07:44:44,574 INFO L226 Difference]: Without dead ends: 1352 [2020-11-28 07:44:44,576 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 07:44:44,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-11-28 07:44:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1139. [2020-11-28 07:44:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-11-28 07:44:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1352 transitions. [2020-11-28 07:44:44,623 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1352 transitions. Word has length 102 [2020-11-28 07:44:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:44,624 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1352 transitions. [2020-11-28 07:44:44,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:44:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1352 transitions. [2020-11-28 07:44:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-28 07:44:44,627 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:44,627 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2020-11-28 07:44:44,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:44:44,627 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:44,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash 554921150, now seen corresponding path program 1 times [2020-11-28 07:44:44,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:44,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783218341] [2020-11-28 07:44:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-28 07:44:44,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783218341] [2020-11-28 07:44:44,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:44,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140135204] [2020-11-28 07:44:44,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:44,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:44,704 INFO L87 Difference]: Start difference. First operand 1139 states and 1352 transitions. Second operand 3 states. [2020-11-28 07:44:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:45,086 INFO L93 Difference]: Finished difference Result 2703 states and 3253 transitions. [2020-11-28 07:44:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:45,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 111 [2020-11-28 07:44:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:45,099 INFO L225 Difference]: With dead ends: 2703 [2020-11-28 07:44:45,099 INFO L226 Difference]: Without dead ends: 1636 [2020-11-28 07:44:45,101 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 07:44:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2020-11-28 07:44:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1423. [2020-11-28 07:44:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1423 states. [2020-11-28 07:44:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1726 transitions. [2020-11-28 07:44:45,143 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1726 transitions. Word has length 111 [2020-11-28 07:44:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:45,143 INFO L481 AbstractCegarLoop]: Abstraction has 1423 states and 1726 transitions. [2020-11-28 07:44:45,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1726 transitions. [2020-11-28 07:44:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-28 07:44:45,147 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:45,147 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:44:45,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:44:45,149 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:45,149 INFO L82 PathProgramCache]: Analyzing trace with hash -632912650, now seen corresponding path program 1 times [2020-11-28 07:44:45,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:45,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887089412] [2020-11-28 07:44:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-28 07:44:45,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887089412] [2020-11-28 07:44:45,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:45,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:44:45,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813732300] [2020-11-28 07:44:45,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:45,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:45,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:45,268 INFO L87 Difference]: Start difference. First operand 1423 states and 1726 transitions. Second operand 3 states. [2020-11-28 07:44:45,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:45,620 INFO L93 Difference]: Finished difference Result 2987 states and 3627 transitions. [2020-11-28 07:44:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:45,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 127 [2020-11-28 07:44:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:45,630 INFO L225 Difference]: With dead ends: 2987 [2020-11-28 07:44:45,630 INFO L226 Difference]: Without dead ends: 1565 [2020-11-28 07:44:45,632 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 07:44:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-11-28 07:44:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2020-11-28 07:44:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-11-28 07:44:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1882 transitions. [2020-11-28 07:44:45,676 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1882 transitions. Word has length 127 [2020-11-28 07:44:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:45,677 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1882 transitions. [2020-11-28 07:44:45,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1882 transitions. [2020-11-28 07:44:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-28 07:44:45,682 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:45,682 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:44:45,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:44:45,683 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1221452336, now seen corresponding path program 1 times [2020-11-28 07:44:45,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:45,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19365071] [2020-11-28 07:44:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-28 07:44:45,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19365071] [2020-11-28 07:44:45,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:45,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:45,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866375742] [2020-11-28 07:44:45,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:44:45,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:45,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:44:45,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:44:45,825 INFO L87 Difference]: Start difference. First operand 1565 states and 1882 transitions. Second operand 4 states. [2020-11-28 07:44:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:46,361 INFO L93 Difference]: Finished difference Result 3129 states and 3775 transitions. [2020-11-28 07:44:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:44:46,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 131 [2020-11-28 07:44:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:46,372 INFO L225 Difference]: With dead ends: 3129 [2020-11-28 07:44:46,372 INFO L226 Difference]: Without dead ends: 1636 [2020-11-28 07:44:46,374 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 07:44:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2020-11-28 07:44:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1565. [2020-11-28 07:44:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-11-28 07:44:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1862 transitions. [2020-11-28 07:44:46,414 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1862 transitions. Word has length 131 [2020-11-28 07:44:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:46,414 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1862 transitions. [2020-11-28 07:44:46,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:44:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1862 transitions. [2020-11-28 07:44:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-28 07:44:46,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:46,419 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 07:44:46,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:44:46,419 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash -175180925, now seen corresponding path program 1 times [2020-11-28 07:44:46,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:46,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105189194] [2020-11-28 07:44:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:44:46,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105189194] [2020-11-28 07:44:46,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:46,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:46,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274355938] [2020-11-28 07:44:46,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:46,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:46,589 INFO L87 Difference]: Start difference. First operand 1565 states and 1862 transitions. Second operand 3 states. [2020-11-28 07:44:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:47,016 INFO L93 Difference]: Finished difference Result 3413 states and 4101 transitions. [2020-11-28 07:44:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:47,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-11-28 07:44:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:47,026 INFO L225 Difference]: With dead ends: 3413 [2020-11-28 07:44:47,026 INFO L226 Difference]: Without dead ends: 1778 [2020-11-28 07:44:47,029 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 07:44:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-28 07:44:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1636. [2020-11-28 07:44:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-11-28 07:44:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1946 transitions. [2020-11-28 07:44:47,071 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1946 transitions. Word has length 148 [2020-11-28 07:44:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:47,073 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 1946 transitions. [2020-11-28 07:44:47,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1946 transitions. [2020-11-28 07:44:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-11-28 07:44:47,078 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:47,079 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 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 07:44:47,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:44:47,079 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:47,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash 316518635, now seen corresponding path program 1 times [2020-11-28 07:44:47,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:47,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48838580] [2020-11-28 07:44:47,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-11-28 07:44:47,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48838580] [2020-11-28 07:44:47,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:44:47,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:44:47,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689627426] [2020-11-28 07:44:47,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:47,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:47,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:44:47,227 INFO L87 Difference]: Start difference. First operand 1636 states and 1946 transitions. Second operand 3 states. [2020-11-28 07:44:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:47,598 INFO L93 Difference]: Finished difference Result 3342 states and 3975 transitions. [2020-11-28 07:44:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:47,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 191 [2020-11-28 07:44:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:47,607 INFO L225 Difference]: With dead ends: 3342 [2020-11-28 07:44:47,607 INFO L226 Difference]: Without dead ends: 1778 [2020-11-28 07:44:47,611 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 07:44:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-28 07:44:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1707. [2020-11-28 07:44:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-11-28 07:44:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 1971 transitions. [2020-11-28 07:44:47,653 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 1971 transitions. Word has length 191 [2020-11-28 07:44:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:47,653 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 1971 transitions. [2020-11-28 07:44:47,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 1971 transitions. [2020-11-28 07:44:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-11-28 07:44:47,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:47,659 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:44:47,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 07:44:47,659 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash -942297628, now seen corresponding path program 1 times [2020-11-28 07:44:47,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:47,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618522327] [2020-11-28 07:44:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 194 proven. 35 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-11-28 07:44:47,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618522327] [2020-11-28 07:44:47,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417550041] [2020-11-28 07:44:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/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 07:44:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:44:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:44:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-11-28 07:44:48,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:44:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2020-11-28 07:44:48,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:44:48,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2020-11-28 07:44:48,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500820829] [2020-11-28 07:44:48,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:44:48,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:44:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:44:48,482 INFO L87 Difference]: Start difference. First operand 1707 states and 1971 transitions. Second operand 3 states. [2020-11-28 07:44:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:48,871 INFO L93 Difference]: Finished difference Result 3413 states and 3953 transitions. [2020-11-28 07:44:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:44:48,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2020-11-28 07:44:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:48,881 INFO L225 Difference]: With dead ends: 3413 [2020-11-28 07:44:48,881 INFO L226 Difference]: Without dead ends: 1778 [2020-11-28 07:44:48,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:44:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2020-11-28 07:44:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1565. [2020-11-28 07:44:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1565 states. [2020-11-28 07:44:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1798 transitions. [2020-11-28 07:44:48,929 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1798 transitions. Word has length 204 [2020-11-28 07:44:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:48,930 INFO L481 AbstractCegarLoop]: Abstraction has 1565 states and 1798 transitions. [2020-11-28 07:44:48,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:44:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1798 transitions. [2020-11-28 07:44:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-11-28 07:44:48,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:44:48,935 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 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, 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] [2020-11-28 07:44:49,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-28 07:44:49,148 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:44:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:44:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -170405630, now seen corresponding path program 1 times [2020-11-28 07:44:49,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:44:49,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126091437] [2020-11-28 07:44:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:44:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 175 proven. 83 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:44:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126091437] [2020-11-28 07:44:49,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680344986] [2020-11-28 07:44:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/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 07:44:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:44:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 07:44:49,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:44:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-28 07:44:49,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:44:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-28 07:44:49,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:44:49,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2020-11-28 07:44:49,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433968475] [2020-11-28 07:44:49,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:44:49,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:44:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:44:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:44:49,869 INFO L87 Difference]: Start difference. First operand 1565 states and 1798 transitions. Second operand 4 states. [2020-11-28 07:44:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:44:50,463 INFO L93 Difference]: Finished difference Result 3482 states and 4042 transitions. [2020-11-28 07:44:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:44:50,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 213 [2020-11-28 07:44:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:44:50,464 INFO L225 Difference]: With dead ends: 3482 [2020-11-28 07:44:50,465 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:44:50,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:44:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:44:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:44:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:44:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:44:50,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 213 [2020-11-28 07:44:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:44:50,469 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:44:50,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:44:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:44:50,469 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:44:50,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 07:44:50,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:44:51,157 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-11-28 07:44:51,466 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L536-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:44:51,470 INFO L274 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L539-1(lines 40 585) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L540(line 540) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-11-28 07:44:51,471 INFO L274 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-11-28 07:44:51,472 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:44:51,473 INFO L274 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-11-28 07:44:51,473 INFO L274 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-11-28 07:44:51,473 INFO L274 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-11-28 07:44:51,473 INFO L270 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse2 (= ~a20~0 1)) (.cse6 (= ~a17~0 1))) (let ((.cse0 (< 13 ~a8~0)) (.cse3 (let ((.cse8 (<= ~a8~0 13))) (or (and .cse2 .cse8) (and .cse6 .cse8)))) (.cse4 (= ~a16~0 6)) (.cse1 (= ~a21~0 1)) (.cse5 (<= ~a16~0 5)) (.cse7 (<= ~a7~0 0))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse4) (and .cse0 .cse5) (<= ~a16~0 4) (and .cse3 .cse2 .cse6) (and .cse4 (<= 15 ~a8~0)) (and .cse1 .cse7 .cse2) (and .cse5 .cse7)))) [2020-11-28 07:44:51,473 INFO L274 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-11-28 07:44:51,473 INFO L274 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-11-28 07:44:51,473 INFO L274 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-11-28 07:44:51,473 INFO L274 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L277 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-11-28 07:44:51,474 INFO L274 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L270 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse2 (= ~a20~0 1)) (.cse6 (= ~a17~0 1))) (let ((.cse0 (< 13 ~a8~0)) (.cse3 (let ((.cse8 (<= ~a8~0 13))) (or (and .cse2 .cse8) (and .cse6 .cse8)))) (.cse4 (= ~a16~0 6)) (.cse1 (= ~a21~0 1)) (.cse5 (<= ~a16~0 5)) (.cse7 (<= ~a7~0 0))) (or (and .cse0 .cse1 .cse2) (and .cse3 .cse4) (and .cse0 .cse5) (<= ~a16~0 4) (and .cse3 .cse2 .cse6) (and .cse4 (<= 15 ~a8~0)) (and .cse1 .cse7 .cse2) (and .cse5 .cse7)))) [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-11-28 07:44:51,475 INFO L274 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-11-28 07:44:51,476 INFO L274 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-11-28 07:44:51,476 INFO L274 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-11-28 07:44:51,476 INFO L274 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-11-28 07:44:51,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:44:51 BoogieIcfgContainer [2020-11-28 07:44:51,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:44:51,519 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:44:51,519 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:44:51,519 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:44:51,520 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:44:39" (3/4) ... [2020-11-28 07:44:51,523 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:44:51,551 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-11-28 07:44:51,553 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:44:51,555 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-11-28 07:44:51,556 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:44:51,716 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_65af184a-9737-4b15-abfe-936bc49ca36b/bin/utaipan/witness.graphml [2020-11-28 07:44:51,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:44:51,717 INFO L168 Benchmark]: Toolchain (without parser) took 15870.00 ms. Allocated memory was 107.0 MB in the beginning and 312.5 MB in the end (delta: 205.5 MB). Free memory was 71.6 MB in the beginning and 155.2 MB in the end (delta: -83.5 MB). Peak memory consumption was 121.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:51,718 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 73.4 MB. Free memory was 31.7 MB in the beginning and 31.7 MB in the end (delta: 15.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:44:51,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 759.71 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 65.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:51,718 INFO L168 Benchmark]: Boogie Procedure Inliner took 90.72 ms. Allocated memory is still 107.0 MB. Free memory was 65.9 MB in the beginning and 60.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:51,719 INFO L168 Benchmark]: Boogie Preprocessor took 76.95 ms. Allocated memory is still 107.0 MB. Free memory was 60.2 MB in the beginning and 55.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:51,719 INFO L168 Benchmark]: RCFGBuilder took 2589.68 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 55.5 MB in the beginning and 64.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 45.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:51,720 INFO L168 Benchmark]: TraceAbstraction took 12138.86 ms. Allocated memory was 134.2 MB in the beginning and 312.5 MB in the end (delta: 178.3 MB). Free memory was 63.6 MB in the beginning and 170.9 MB in the end (delta: -107.3 MB). Peak memory consumption was 146.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:51,720 INFO L168 Benchmark]: Witness Printer took 197.23 ms. Allocated memory is still 312.5 MB. Free memory was 170.9 MB in the beginning and 155.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:44:51,722 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 73.4 MB. Free memory was 31.7 MB in the beginning and 31.7 MB in the end (delta: 15.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 759.71 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 65.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 90.72 ms. Allocated memory is still 107.0 MB. Free memory was 65.9 MB in the beginning and 60.2 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.95 ms. Allocated memory is still 107.0 MB. Free memory was 60.2 MB in the beginning and 55.5 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2589.68 ms. Allocated memory was 107.0 MB in the beginning and 134.2 MB in the end (delta: 27.3 MB). Free memory was 55.5 MB in the beginning and 64.6 MB in the end (delta: -9.1 MB). Peak memory consumption was 45.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12138.86 ms. Allocated memory was 134.2 MB in the beginning and 312.5 MB in the end (delta: 178.3 MB). Free memory was 63.6 MB in the beginning and 170.9 MB in the end (delta: -107.3 MB). Peak memory consumption was 146.5 MB. Max. memory is 16.1 GB. * Witness Printer took 197.23 ms. Allocated memory is still 312.5 MB. Free memory was 170.9 MB in the beginning and 155.2 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: ((((((((13 < a8 && a21 == 1) && a20 == 1) || (((a20 == 1 && a8 <= 13) || (a17 == 1 && a8 <= 13)) && a16 == 6)) || (13 < a8 && a16 <= 5)) || a16 <= 4) || ((((a20 == 1 && a8 <= 13) || (a17 == 1 && a8 <= 13)) && a20 == 1) && a17 == 1)) || (a16 == 6 && 15 <= a8)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (a16 <= 5 && a7 <= 0) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((13 < a8 && a21 == 1) && a20 == 1) || (((a20 == 1 && a8 <= 13) || (a17 == 1 && a8 <= 13)) && a16 == 6)) || (13 < a8 && a16 <= 5)) || a16 <= 4) || ((((a20 == 1 && a8 <= 13) || (a17 == 1 && a8 <= 13)) && a20 == 1) && a17 == 1)) || (a16 == 6 && 15 <= a8)) || ((a21 == 1 && a7 <= 0) && a20 == 1)) || (a16 <= 5 && a7 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.2s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 674 SDtfs, 1013 SDslu, 66 SDs, 0 SdLazy, 3087 SolverSat, 724 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 872 GetRequests, 846 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1707occurred in iteration=12, 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, 14 MinimizatonAttempts, 1420 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 71 NumberOfFragments, 173 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3366 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 448 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 2160 NumberOfCodeBlocks, 2160 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 2559 ConstructedInterpolants, 0 QuantifiedInterpolants, 1333056 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1010 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 18 InterpolantComputations, 16 PerfectInterpolantSequences, 2435/2553 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...