./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/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 0610fb40496b0ecade3a5ec9ba274ec558241ab5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:52:40,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:52:40,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:52:40,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:52:40,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:52:40,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:52:40,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:52:40,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:52:40,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:52:40,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:52:40,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:52:40,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:52:40,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:52:40,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:52:40,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:52:40,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:52:40,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:52:40,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:52:40,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:52:40,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:52:40,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:52:40,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:52:40,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:52:40,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:52:40,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:52:40,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:52:40,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:52:40,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:52:40,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:52:40,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:52:40,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:52:40,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:52:40,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:52:40,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:52:40,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:52:40,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:52:40,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:52:40,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:52:40,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:52:40,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:52:40,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:52:40,603 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 05:52:40,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:52:40,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:52:40,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:52:40,624 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:52:40,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:52:40,624 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:52:40,624 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:52:40,624 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:52:40,634 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:52:40,634 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:52:40,634 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:52:40,634 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:52:40,635 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:52:40,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:52:40,635 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:52:40,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:52:40,635 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 05:52:40,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:52:40,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 05:52:40,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:52:40,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:52:40,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:52:40,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:52:40,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:52:40,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 05:52:40,637 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:52:40,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:52:40,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 05:52:40,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:52:40,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:52:40,638 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_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0610fb40496b0ecade3a5ec9ba274ec558241ab5 [2020-12-09 05:52:40,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:52:40,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:52:40,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:52:40,813 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:52:40,814 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:52:40,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/../../sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2020-12-09 05:52:40,856 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/data/cf7768909/b3f9281b1f2941fb92883a48d57325fc/FLAG2c24c8055 [2020-12-09 05:52:41,284 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:52:41,285 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2020-12-09 05:52:41,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/data/cf7768909/b3f9281b1f2941fb92883a48d57325fc/FLAG2c24c8055 [2020-12-09 05:52:41,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/data/cf7768909/b3f9281b1f2941fb92883a48d57325fc [2020-12-09 05:52:41,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:52:41,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:52:41,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:52:41,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:52:41,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:52:41,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16021bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41, skipping insertion in model container [2020-12-09 05:52:41,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:52:41,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:52:41,576 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/sv-benchmarks/c/eca-rers2012/Problem01_label06.c[20964,20977] [2020-12-09 05:52:41,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:52:41,596 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:52:41,654 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/sv-benchmarks/c/eca-rers2012/Problem01_label06.c[20964,20977] [2020-12-09 05:52:41,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:52:41,671 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:52:41,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41 WrapperNode [2020-12-09 05:52:41,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:52:41,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:52:41,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:52:41,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:52:41,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:52:41,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:52:41,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:52:41,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:52:41,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... [2020-12-09 05:52:41,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:52:41,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:52:41,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:52:41,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:52:41,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/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 [2020-12-09 05:52:41,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 05:52:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 05:52:41,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:52:41,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:52:43,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:52:43,044 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 05:52:43,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:43 BoogieIcfgContainer [2020-12-09 05:52:43,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:52:43,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:52:43,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:52:43,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:52:43,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:52:41" (1/3) ... [2020-12-09 05:52:43,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e1f64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:52:43, skipping insertion in model container [2020-12-09 05:52:43,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:41" (2/3) ... [2020-12-09 05:52:43,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e1f64b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:52:43, skipping insertion in model container [2020-12-09 05:52:43,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:43" (3/3) ... [2020-12-09 05:52:43,052 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2020-12-09 05:52:43,061 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:52:43,064 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 05:52:43,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 05:52:43,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:52:43,087 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 05:52:43,087 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:52:43,087 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:52:43,087 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:52:43,088 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:52:43,088 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:52:43,088 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:52:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-12-09 05:52:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-09 05:52:43,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:43,103 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] [2020-12-09 05:52:43,104 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:43,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1806905944, now seen corresponding path program 1 times [2020-12-09 05:52:43,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:43,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832457081] [2020-12-09 05:52:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:52:43,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832457081] [2020-12-09 05:52:43,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:43,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:52:43,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594233411] [2020-12-09 05:52:43,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:43,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:43,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:43,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:52:43,372 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-12-09 05:52:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:43,641 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2020-12-09 05:52:43,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:43,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2020-12-09 05:52:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:43,650 INFO L225 Difference]: With dead ends: 224 [2020-12-09 05:52:43,650 INFO L226 Difference]: Without dead ends: 145 [2020-12-09 05:52:43,652 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 [2020-12-09 05:52:43,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-09 05:52:43,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-12-09 05:52:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-09 05:52:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 253 transitions. [2020-12-09 05:52:43,686 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 253 transitions. Word has length 71 [2020-12-09 05:52:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:43,687 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 253 transitions. [2020-12-09 05:52:43,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 253 transitions. [2020-12-09 05:52:43,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-09 05:52:43,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:43,690 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-12-09 05:52:43,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:52:43,690 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:43,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1996671840, now seen corresponding path program 1 times [2020-12-09 05:52:43,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:43,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069615363] [2020-12-09 05:52:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 05:52:43,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069615363] [2020-12-09 05:52:43,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:43,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:52:43,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307528148] [2020-12-09 05:52:43,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:43,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:52:43,775 INFO L87 Difference]: Start difference. First operand 145 states and 253 transitions. Second operand 3 states. [2020-12-09 05:52:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:44,005 INFO L93 Difference]: Finished difference Result 431 states and 756 transitions. [2020-12-09 05:52:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:44,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-09 05:52:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:44,008 INFO L225 Difference]: With dead ends: 431 [2020-12-09 05:52:44,008 INFO L226 Difference]: Without dead ends: 287 [2020-12-09 05:52:44,009 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 [2020-12-09 05:52:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-09 05:52:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-09 05:52:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-09 05:52:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 467 transitions. [2020-12-09 05:52:44,025 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 467 transitions. Word has length 75 [2020-12-09 05:52:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:44,025 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 467 transitions. [2020-12-09 05:52:44,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 467 transitions. [2020-12-09 05:52:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-09 05:52:44,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:44,028 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:52:44,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:52:44,028 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash 525301462, now seen corresponding path program 1 times [2020-12-09 05:52:44,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:44,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876203698] [2020-12-09 05:52:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:52:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876203698] [2020-12-09 05:52:44,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:44,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:52:44,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043946432] [2020-12-09 05:52:44,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:52:44,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:44,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:52:44,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:52:44,109 INFO L87 Difference]: Start difference. First operand 287 states and 467 transitions. Second operand 4 states. [2020-12-09 05:52:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:44,421 INFO L93 Difference]: Finished difference Result 715 states and 1141 transitions. [2020-12-09 05:52:44,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:52:44,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-09 05:52:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:44,424 INFO L225 Difference]: With dead ends: 715 [2020-12-09 05:52:44,424 INFO L226 Difference]: Without dead ends: 429 [2020-12-09 05:52:44,426 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 [2020-12-09 05:52:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-12-09 05:52:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2020-12-09 05:52:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-09 05:52:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 639 transitions. [2020-12-09 05:52:44,443 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 639 transitions. Word has length 105 [2020-12-09 05:52:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:44,444 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 639 transitions. [2020-12-09 05:52:44,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:52:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 639 transitions. [2020-12-09 05:52:44,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-09 05:52:44,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:44,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:52:44,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:52:44,447 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash -863059680, now seen corresponding path program 1 times [2020-12-09 05:52:44,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:44,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369116415] [2020-12-09 05:52:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 05:52:44,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369116415] [2020-12-09 05:52:44,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:44,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:52:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380125077] [2020-12-09 05:52:44,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:44,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:44,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:52:44,506 INFO L87 Difference]: Start difference. First operand 429 states and 639 transitions. Second operand 3 states. [2020-12-09 05:52:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:44,698 INFO L93 Difference]: Finished difference Result 999 states and 1479 transitions. [2020-12-09 05:52:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:44,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-09 05:52:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:44,702 INFO L225 Difference]: With dead ends: 999 [2020-12-09 05:52:44,702 INFO L226 Difference]: Without dead ends: 571 [2020-12-09 05:52:44,703 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 [2020-12-09 05:52:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-09 05:52:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 429. [2020-12-09 05:52:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-12-09 05:52:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 627 transitions. [2020-12-09 05:52:44,721 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 627 transitions. Word has length 109 [2020-12-09 05:52:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:44,721 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 627 transitions. [2020-12-09 05:52:44,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 627 transitions. [2020-12-09 05:52:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-09 05:52:44,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:44,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:52:44,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:52:44,724 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1821422808, now seen corresponding path program 1 times [2020-12-09 05:52:44,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:44,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910089050] [2020-12-09 05:52:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 05:52:44,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910089050] [2020-12-09 05:52:44,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:44,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:52:44,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095793572] [2020-12-09 05:52:44,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:52:44,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:52:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:52:44,774 INFO L87 Difference]: Start difference. First operand 429 states and 627 transitions. Second operand 4 states. [2020-12-09 05:52:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:45,079 INFO L93 Difference]: Finished difference Result 1354 states and 1955 transitions. [2020-12-09 05:52:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:52:45,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-12-09 05:52:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:45,084 INFO L225 Difference]: With dead ends: 1354 [2020-12-09 05:52:45,084 INFO L226 Difference]: Without dead ends: 784 [2020-12-09 05:52:45,085 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 [2020-12-09 05:52:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-12-09 05:52:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2020-12-09 05:52:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2020-12-09 05:52:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 998 transitions. [2020-12-09 05:52:45,108 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 998 transitions. Word has length 113 [2020-12-09 05:52:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:45,109 INFO L481 AbstractCegarLoop]: Abstraction has 784 states and 998 transitions. [2020-12-09 05:52:45,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:52:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 998 transitions. [2020-12-09 05:52:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-09 05:52:45,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:45,112 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:52:45,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 05:52:45,112 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:45,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1123295756, now seen corresponding path program 1 times [2020-12-09 05:52:45,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:45,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927593831] [2020-12-09 05:52:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-09 05:52:45,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927593831] [2020-12-09 05:52:45,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:45,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:52:45,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223775998] [2020-12-09 05:52:45,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:45,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:45,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:52:45,174 INFO L87 Difference]: Start difference. First operand 784 states and 998 transitions. Second operand 3 states. [2020-12-09 05:52:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:45,385 INFO L93 Difference]: Finished difference Result 1851 states and 2333 transitions. [2020-12-09 05:52:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:45,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-09 05:52:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:45,391 INFO L225 Difference]: With dead ends: 1851 [2020-12-09 05:52:45,391 INFO L226 Difference]: Without dead ends: 1068 [2020-12-09 05:52:45,393 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 [2020-12-09 05:52:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-12-09 05:52:45,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2020-12-09 05:52:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-12-09 05:52:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1175 transitions. [2020-12-09 05:52:45,419 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1175 transitions. Word has length 122 [2020-12-09 05:52:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:45,419 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1175 transitions. [2020-12-09 05:52:45,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1175 transitions. [2020-12-09 05:52:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-09 05:52:45,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:45,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-09 05:52:45,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 05:52:45,423 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1134312442, now seen corresponding path program 1 times [2020-12-09 05:52:45,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:45,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112994384] [2020-12-09 05:52:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-09 05:52:45,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112994384] [2020-12-09 05:52:45,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:45,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:52:45,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076093281] [2020-12-09 05:52:45,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:45,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:45,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:45,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:52:45,478 INFO L87 Difference]: Start difference. First operand 926 states and 1175 transitions. Second operand 3 states. [2020-12-09 05:52:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:45,699 INFO L93 Difference]: Finished difference Result 1851 states and 2349 transitions. [2020-12-09 05:52:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:45,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-09 05:52:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:45,704 INFO L225 Difference]: With dead ends: 1851 [2020-12-09 05:52:45,704 INFO L226 Difference]: Without dead ends: 926 [2020-12-09 05:52:45,706 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 [2020-12-09 05:52:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2020-12-09 05:52:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 926. [2020-12-09 05:52:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2020-12-09 05:52:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1161 transitions. [2020-12-09 05:52:45,727 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1161 transitions. Word has length 138 [2020-12-09 05:52:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:45,727 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1161 transitions. [2020-12-09 05:52:45,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1161 transitions. [2020-12-09 05:52:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-09 05:52:45,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:45,730 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-09 05:52:45,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 05:52:45,730 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:45,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2113824420, now seen corresponding path program 1 times [2020-12-09 05:52:45,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:45,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800620263] [2020-12-09 05:52:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-09 05:52:45,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800620263] [2020-12-09 05:52:45,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:45,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:52:45,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234466713] [2020-12-09 05:52:45,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 05:52:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 05:52:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 05:52:45,797 INFO L87 Difference]: Start difference. First operand 926 states and 1161 transitions. Second operand 4 states. [2020-12-09 05:52:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:46,060 INFO L93 Difference]: Finished difference Result 1922 states and 2403 transitions. [2020-12-09 05:52:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:52:46,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2020-12-09 05:52:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:46,066 INFO L225 Difference]: With dead ends: 1922 [2020-12-09 05:52:46,066 INFO L226 Difference]: Without dead ends: 997 [2020-12-09 05:52:46,067 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 [2020-12-09 05:52:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2020-12-09 05:52:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2020-12-09 05:52:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 997 states. [2020-12-09 05:52:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1230 transitions. [2020-12-09 05:52:46,092 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1230 transitions. Word has length 154 [2020-12-09 05:52:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:46,092 INFO L481 AbstractCegarLoop]: Abstraction has 997 states and 1230 transitions. [2020-12-09 05:52:46,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 05:52:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1230 transitions. [2020-12-09 05:52:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-09 05:52:46,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:46,096 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:52:46,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 05:52:46,096 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:46,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1461364887, now seen corresponding path program 1 times [2020-12-09 05:52:46,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:46,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37211429] [2020-12-09 05:52:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-09 05:52:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37211429] [2020-12-09 05:52:46,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:46,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:52:46,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996443073] [2020-12-09 05:52:46,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:46,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:46,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:52:46,177 INFO L87 Difference]: Start difference. First operand 997 states and 1230 transitions. Second operand 3 states. [2020-12-09 05:52:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:46,384 INFO L93 Difference]: Finished difference Result 2277 states and 2824 transitions. [2020-12-09 05:52:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:46,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2020-12-09 05:52:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:46,389 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 05:52:46,389 INFO L226 Difference]: Without dead ends: 1281 [2020-12-09 05:52:46,390 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 [2020-12-09 05:52:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-12-09 05:52:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1068. [2020-12-09 05:52:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-12-09 05:52:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1322 transitions. [2020-12-09 05:52:46,408 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1322 transitions. Word has length 171 [2020-12-09 05:52:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:46,409 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1322 transitions. [2020-12-09 05:52:46,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1322 transitions. [2020-12-09 05:52:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-09 05:52:46,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:46,412 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-12-09 05:52:46,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 05:52:46,412 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1682001672, now seen corresponding path program 1 times [2020-12-09 05:52:46,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:46,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856073228] [2020-12-09 05:52:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-09 05:52:46,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856073228] [2020-12-09 05:52:46,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:46,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 05:52:46,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484057368] [2020-12-09 05:52:46,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:52:46,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:52:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:52:46,545 INFO L87 Difference]: Start difference. First operand 1068 states and 1322 transitions. Second operand 5 states. [2020-12-09 05:52:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:46,788 INFO L93 Difference]: Finished difference Result 2309 states and 2828 transitions. [2020-12-09 05:52:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 05:52:46,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-12-09 05:52:46,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:46,795 INFO L225 Difference]: With dead ends: 2309 [2020-12-09 05:52:46,795 INFO L226 Difference]: Without dead ends: 1242 [2020-12-09 05:52:46,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:52:46,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-12-09 05:52:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1139. [2020-12-09 05:52:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 05:52:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1375 transitions. [2020-12-09 05:52:46,824 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1375 transitions. Word has length 220 [2020-12-09 05:52:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:46,825 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1375 transitions. [2020-12-09 05:52:46,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:52:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1375 transitions. [2020-12-09 05:52:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-12-09 05:52:46,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:46,828 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-12-09 05:52:46,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 05:52:46,828 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:46,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1742521433, now seen corresponding path program 1 times [2020-12-09 05:52:46,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:46,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251319559] [2020-12-09 05:52:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 284 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-09 05:52:46,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251319559] [2020-12-09 05:52:46,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:52:46,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:52:46,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524703293] [2020-12-09 05:52:46,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:46,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:46,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:46,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:52:46,943 INFO L87 Difference]: Start difference. First operand 1139 states and 1375 transitions. Second operand 3 states. [2020-12-09 05:52:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:47,142 INFO L93 Difference]: Finished difference Result 2277 states and 2749 transitions. [2020-12-09 05:52:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:47,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 233 [2020-12-09 05:52:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:47,147 INFO L225 Difference]: With dead ends: 2277 [2020-12-09 05:52:47,147 INFO L226 Difference]: Without dead ends: 1139 [2020-12-09 05:52:47,148 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 [2020-12-09 05:52:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-12-09 05:52:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2020-12-09 05:52:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1139 states. [2020-12-09 05:52:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1326 transitions. [2020-12-09 05:52:47,165 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1326 transitions. Word has length 233 [2020-12-09 05:52:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:47,166 INFO L481 AbstractCegarLoop]: Abstraction has 1139 states and 1326 transitions. [2020-12-09 05:52:47,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1326 transitions. [2020-12-09 05:52:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-09 05:52:47,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:47,169 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-12-09 05:52:47,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 05:52:47,169 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1337016639, now seen corresponding path program 1 times [2020-12-09 05:52:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:47,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499901890] [2020-12-09 05:52:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 82 proven. 261 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-09 05:52:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499901890] [2020-12-09 05:52:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904831722] [2020-12-09 05:52:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/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 [2020-12-09 05:52:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 05:52:47,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:52:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-09 05:52:47,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:52:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-12-09 05:52:47,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 05:52:47,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2020-12-09 05:52:47,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742439958] [2020-12-09 05:52:47,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:47,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:47,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:47,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:52:47,800 INFO L87 Difference]: Start difference. First operand 1139 states and 1326 transitions. Second operand 3 states. [2020-12-09 05:52:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:47,947 INFO L93 Difference]: Finished difference Result 2490 states and 2917 transitions. [2020-12-09 05:52:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:47,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 242 [2020-12-09 05:52:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:47,952 INFO L225 Difference]: With dead ends: 2490 [2020-12-09 05:52:47,952 INFO L226 Difference]: Without dead ends: 1352 [2020-12-09 05:52:47,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 05:52:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-12-09 05:52:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2020-12-09 05:52:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2020-12-09 05:52:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1410 transitions. [2020-12-09 05:52:47,971 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1410 transitions. Word has length 242 [2020-12-09 05:52:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:47,971 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1410 transitions. [2020-12-09 05:52:47,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1410 transitions. [2020-12-09 05:52:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-12-09 05:52:47,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:52:47,973 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-12-09 05:52:48,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-09 05:52:48,175 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 05:52:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:52:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1841236912, now seen corresponding path program 1 times [2020-12-09 05:52:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:52:48,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458036051] [2020-12-09 05:52:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:52:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 182 proven. 103 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-09 05:52:48,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458036051] [2020-12-09 05:52:48,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881729793] [2020-12-09 05:52:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/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 [2020-12-09 05:52:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:52:48,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 05:52:48,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 05:52:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-09 05:52:48,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 05:52:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-12-09 05:52:48,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 05:52:48,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2020-12-09 05:52:48,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874736228] [2020-12-09 05:52:48,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:52:48,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:52:48,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:52:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:52:48,895 INFO L87 Difference]: Start difference. First operand 1210 states and 1410 transitions. Second operand 3 states. [2020-12-09 05:52:49,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:52:49,068 INFO L93 Difference]: Finished difference Result 2488 states and 2867 transitions. [2020-12-09 05:52:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:52:49,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-12-09 05:52:49,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:52:49,069 INFO L225 Difference]: With dead ends: 2488 [2020-12-09 05:52:49,069 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 05:52:49,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 508 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:52:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 05:52:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 05:52:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 05:52:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 05:52:49,071 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 255 [2020-12-09 05:52:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:52:49,071 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 05:52:49,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:52:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 05:52:49,072 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 05:52:49,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-09 05:52:49,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 05:52:49,534 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-12-09 05:52:49,691 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2020-12-09 05:52:49,693 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2020-12-09 05:52:49,694 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse3 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse8 (<= ~a16~0 4)) (.cse1 (<= ~a21~0 0)) (.cse7 (= ~a16~0 6)) (.cse5 (= ~a21~0 1)) (.cse9 (<= 14 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse4 (not .cse6))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse5 .cse6 .cse3 .cse2) (and .cse7 .cse1 .cse6) (and .cse5 .cse8 .cse3) (and .cse8 .cse6 .cse2) (and .cse8 .cse1 .cse6) (and .cse7 .cse4 (<= 15 ~a8~0)) (and .cse9 .cse5 .cse6) (and .cse9 .cse0 .cse4)))) [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2020-12-09 05:52:49,695 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2020-12-09 05:52:49,695 INFO L262 CegarLoopResult]: For program point L554-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L557-1(lines 40 585) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L558(line 558) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse6 (= ~a20~0 1))) (let ((.cse3 (not (= ~a7~0 1))) (.cse2 (= ~a17~0 1)) (.cse8 (<= ~a16~0 4)) (.cse1 (<= ~a21~0 0)) (.cse7 (= ~a16~0 6)) (.cse5 (= ~a21~0 1)) (.cse9 (<= 14 ~a8~0)) (.cse0 (<= ~a16~0 5)) (.cse4 (not .cse6))) (or (and .cse0 .cse1 .cse2) (and .cse0 .cse3 .cse4) (and .cse5 .cse6 .cse3 .cse2) (and .cse7 .cse1 .cse6) (and .cse5 .cse8 .cse3) (and .cse8 .cse6 .cse2) (and .cse8 .cse1 .cse6) (and .cse7 .cse4 (<= 15 ~a8~0)) (and .cse9 .cse5 .cse6) (and .cse9 .cse0 .cse4)))) [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 558) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2020-12-09 05:52:49,696 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2020-12-09 05:52:49,697 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2020-12-09 05:52:49,697 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2020-12-09 05:52:49,697 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2020-12-09 05:52:49,697 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2020-12-09 05:52:49,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:52:49 BoogieIcfgContainer [2020-12-09 05:52:49,716 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:52:49,716 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:52:49,716 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:52:49,716 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:52:49,717 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:43" (3/4) ... [2020-12-09 05:52:49,720 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 05:52:49,740 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2020-12-09 05:52:49,741 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 05:52:49,743 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-09 05:52:49,745 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 05:52:49,828 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6cac3f92-06dd-4bc0-b088-4aa0fcdc1720/bin/utaipan/witness.graphml [2020-12-09 05:52:49,828 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:52:49,828 INFO L168 Benchmark]: Toolchain (without parser) took 8518.96 ms. Allocated memory was 119.5 MB in the beginning and 373.3 MB in the end (delta: 253.8 MB). Free memory was 95.8 MB in the beginning and 176.2 MB in the end (delta: -80.4 MB). Peak memory consumption was 173.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:52:49,829 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 69.2 MB. Free memory is still 40.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:52:49,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.67 ms. Allocated memory is still 119.5 MB. Free memory was 95.8 MB in the beginning and 74.5 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 05:52:49,829 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.38 ms. Allocated memory is still 119.5 MB. Free memory was 74.5 MB in the beginning and 68.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 05:52:49,829 INFO L168 Benchmark]: Boogie Preprocessor took 46.44 ms. Allocated memory is still 119.5 MB. Free memory was 68.8 MB in the beginning and 64.0 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:52:49,830 INFO L168 Benchmark]: RCFGBuilder took 1267.48 ms. Allocated memory was 119.5 MB in the beginning and 155.2 MB in the end (delta: 35.7 MB). Free memory was 64.0 MB in the beginning and 103.0 MB in the end (delta: -39.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 16.1 GB. [2020-12-09 05:52:49,830 INFO L168 Benchmark]: TraceAbstraction took 6668.33 ms. Allocated memory was 155.2 MB in the beginning and 373.3 MB in the end (delta: 218.1 MB). Free memory was 103.0 MB in the beginning and 190.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 129.2 MB. Max. memory is 16.1 GB. [2020-12-09 05:52:49,830 INFO L168 Benchmark]: Witness Printer took 111.82 ms. Allocated memory is still 373.3 MB. Free memory was 190.9 MB in the beginning and 176.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 05:52:49,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 69.2 MB. Free memory is still 40.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.67 ms. Allocated memory is still 119.5 MB. Free memory was 95.8 MB in the beginning and 74.5 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.38 ms. Allocated memory is still 119.5 MB. Free memory was 74.5 MB in the beginning and 68.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.44 ms. Allocated memory is still 119.5 MB. Free memory was 68.8 MB in the beginning and 64.0 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1267.48 ms. Allocated memory was 119.5 MB in the beginning and 155.2 MB in the end (delta: 35.7 MB). Free memory was 64.0 MB in the beginning and 103.0 MB in the end (delta: -39.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6668.33 ms. Allocated memory was 155.2 MB in the beginning and 373.3 MB in the end (delta: 218.1 MB). Free memory was 103.0 MB in the beginning and 190.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 129.2 MB. Max. memory is 16.1 GB. * Witness Printer took 111.82 ms. Allocated memory is still 373.3 MB. Free memory was 190.9 MB in the beginning and 176.2 MB in the end (delta: 14.7 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: 558]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && !(a7 == 1)) && !(a20 == 1))) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 == 6 && a21 <= 0) && a20 == 1)) || ((a21 == 1 && a16 <= 4) && !(a7 == 1))) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a20 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((14 <= a8 && a21 == 1) && a20 == 1)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1)) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 <= 5 && a21 <= 0) && a17 == 1) || ((a16 <= 5 && !(a7 == 1)) && !(a20 == 1))) || (((a21 == 1 && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 == 6 && a21 <= 0) && a20 == 1)) || ((a21 == 1 && a16 <= 4) && !(a7 == 1))) || ((a16 <= 4 && a20 == 1) && a17 == 1)) || ((a16 <= 4 && a21 <= 0) && a20 == 1)) || ((a16 == 6 && !(a20 == 1)) && 15 <= a8)) || ((14 <= a8 && a21 == 1) && a20 == 1)) || ((14 <= a8 && a16 <= 5) && !(a20 == 1)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 13, TraceHistogramMax: 7, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 614 SDtfs, 1026 SDslu, 59 SDs, 0 SdLazy, 2999 SolverSat, 762 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1032 GetRequests, 1005 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1210occurred 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: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 742 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 221 HoareAnnotationTreeSize, 3 FomulaSimplifications, 3006 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 660 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 2505 NumberOfCodeBlocks, 2505 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 2985 ConstructedInterpolants, 0 QuantifiedInterpolants, 1963070 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1039 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 17 InterpolantComputations, 15 PerfectInterpolantSequences, 3204/3568 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...