./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_14-1.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_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_14-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/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 1e59705ae4b9d6434bb0d27311e7a023ef1b3945 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 08:20:16,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:20:16,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:20:16,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:20:16,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:20:16,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:20:16,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:20:16,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:20:16,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:20:16,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:20:16,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:20:16,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:20:16,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:20:16,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:20:16,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:20:16,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:20:16,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:20:16,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:20:16,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:20:16,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:20:16,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:20:16,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:20:16,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:20:16,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:20:16,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:20:16,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:20:16,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:20:16,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:20:16,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:20:16,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:20:16,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:20:16,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:20:16,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:20:16,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:20:16,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:20:16,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:20:16,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:20:16,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:20:16,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:20:16,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:20:16,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:20:16,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:20:16,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:20:16,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:20:16,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:20:16,613 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:20:16,614 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:20:16,614 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:20:16,614 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:20:16,614 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:20:16,614 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:20:16,614 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:20:16,614 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:20:16,614 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:20:16,615 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:20:16,615 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:20:16,615 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:20:16,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:20:16,616 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:20:16,617 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:20:16,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:20:16,617 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:20:16,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:20:16,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:20:16,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:20:16,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:20:16,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:20:16,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:20:16,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:20:16,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:20:16,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:20:16,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:20:16,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:20:16,618 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:20:16,618 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_9d26ab80-57b2-415b-8998-f10881497f9e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e59705ae4b9d6434bb0d27311e7a023ef1b3945 [2020-12-09 08:20:16,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:20:16,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:20:16,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:20:16,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:20:16,819 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:20:16,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/../../sv-benchmarks/c/locks/test_locks_14-1.c [2020-12-09 08:20:16,860 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/data/03fbb2443/e68a9122c4124a199be9aac0e356c53c/FLAGa85640b96 [2020-12-09 08:20:17,257 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:20:17,257 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/sv-benchmarks/c/locks/test_locks_14-1.c [2020-12-09 08:20:17,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/data/03fbb2443/e68a9122c4124a199be9aac0e356c53c/FLAGa85640b96 [2020-12-09 08:20:17,273 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/data/03fbb2443/e68a9122c4124a199be9aac0e356c53c [2020-12-09 08:20:17,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:20:17,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:20:17,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:20:17,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:20:17,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:20:17,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54171f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17, skipping insertion in model container [2020-12-09 08:20:17,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:20:17,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:20:17,427 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_9d26ab80-57b2-415b-8998-f10881497f9e/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2020-12-09 08:20:17,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:20:17,439 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:20:17,465 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_9d26ab80-57b2-415b-8998-f10881497f9e/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2020-12-09 08:20:17,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:20:17,480 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:20:17,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17 WrapperNode [2020-12-09 08:20:17,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:20:17,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:20:17,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:20:17,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:20:17,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:20:17,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:20:17,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:20:17,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:20:17,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... [2020-12-09 08:20:17,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:20:17,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:20:17,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:20:17,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:20:17,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/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 08:20:17,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:20:17,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:20:17,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:20:17,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:20:18,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:20:18,040 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 08:20:18,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:20:18 BoogieIcfgContainer [2020-12-09 08:20:18,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:20:18,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:20:18,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:20:18,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:20:18,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:20:17" (1/3) ... [2020-12-09 08:20:18,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd6972b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:20:18, skipping insertion in model container [2020-12-09 08:20:18,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:20:17" (2/3) ... [2020-12-09 08:20:18,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd6972b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:20:18, skipping insertion in model container [2020-12-09 08:20:18,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:20:18" (3/3) ... [2020-12-09 08:20:18,048 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2020-12-09 08:20:18,058 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:20:18,060 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:20:18,068 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:20:18,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:20:18,086 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:20:18,086 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:20:18,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:20:18,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:20:18,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:20:18,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:20:18,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:20:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-12-09 08:20:18,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 08:20:18,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,100 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash -96656291, now seen corresponding path program 1 times [2020-12-09 08:20:18,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321427068] [2020-12-09 08:20:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:20:18,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321427068] [2020-12-09 08:20:18,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102570794] [2020-12-09 08:20:18,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,269 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-12-09 08:20:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,305 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2020-12-09 08:20:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 08:20:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,316 INFO L225 Difference]: With dead ends: 74 [2020-12-09 08:20:18,317 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 08:20:18,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 08:20:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 33. [2020-12-09 08:20:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 59 transitions. [2020-12-09 08:20:18,352 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 59 transitions. Word has length 6 [2020-12-09 08:20:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,352 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 59 transitions. [2020-12-09 08:20:18,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 59 transitions. [2020-12-09 08:20:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:20:18,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:20:18,354 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1298834327, now seen corresponding path program 1 times [2020-12-09 08:20:18,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994153630] [2020-12-09 08:20:18,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,415 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 08:20:18,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994153630] [2020-12-09 08:20:18,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629493274] [2020-12-09 08:20:18,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,418 INFO L87 Difference]: Start difference. First operand 33 states and 59 transitions. Second operand 4 states. [2020-12-09 08:20:18,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,440 INFO L93 Difference]: Finished difference Result 63 states and 111 transitions. [2020-12-09 08:20:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 08:20:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,442 INFO L225 Difference]: With dead ends: 63 [2020-12-09 08:20:18,442 INFO L226 Difference]: Without dead ends: 61 [2020-12-09 08:20:18,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-09 08:20:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2020-12-09 08:20:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 58 transitions. [2020-12-09 08:20:18,449 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 58 transitions. Word has length 7 [2020-12-09 08:20:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,449 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 58 transitions. [2020-12-09 08:20:18,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 58 transitions. [2020-12-09 08:20:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:20:18,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:20:18,450 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1609370866, now seen corresponding path program 1 times [2020-12-09 08:20:18,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338892404] [2020-12-09 08:20:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,494 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 08:20:18,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338892404] [2020-12-09 08:20:18,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851315909] [2020-12-09 08:20:18,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,497 INFO L87 Difference]: Start difference. First operand 33 states and 58 transitions. Second operand 4 states. [2020-12-09 08:20:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,516 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2020-12-09 08:20:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 08:20:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,517 INFO L225 Difference]: With dead ends: 61 [2020-12-09 08:20:18,517 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 08:20:18,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 08:20:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2020-12-09 08:20:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 57 transitions. [2020-12-09 08:20:18,523 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 57 transitions. Word has length 8 [2020-12-09 08:20:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,523 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 57 transitions. [2020-12-09 08:20:18,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 57 transitions. [2020-12-09 08:20:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:20:18,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 08:20:18,524 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1648897972, now seen corresponding path program 1 times [2020-12-09 08:20:18,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000854907] [2020-12-09 08:20:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,566 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 08:20:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000854907] [2020-12-09 08:20:18,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093455794] [2020-12-09 08:20:18,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,569 INFO L87 Difference]: Start difference. First operand 33 states and 57 transitions. Second operand 4 states. [2020-12-09 08:20:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,586 INFO L93 Difference]: Finished difference Result 59 states and 101 transitions. [2020-12-09 08:20:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 08:20:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,588 INFO L225 Difference]: With dead ends: 59 [2020-12-09 08:20:18,588 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 08:20:18,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 08:20:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2020-12-09 08:20:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2020-12-09 08:20:18,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 9 [2020-12-09 08:20:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,594 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2020-12-09 08:20:18,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2020-12-09 08:20:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 08:20:18,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 08:20:18,595 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,595 INFO L82 PathProgramCache]: Analyzing trace with hash 423983495, now seen corresponding path program 1 times [2020-12-09 08:20:18,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951021526] [2020-12-09 08:20:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,643 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 08:20:18,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951021526] [2020-12-09 08:20:18,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615708721] [2020-12-09 08:20:18,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,645 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand 4 states. [2020-12-09 08:20:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,663 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2020-12-09 08:20:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 08:20:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,665 INFO L225 Difference]: With dead ends: 57 [2020-12-09 08:20:18,665 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 08:20:18,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 08:20:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2020-12-09 08:20:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 55 transitions. [2020-12-09 08:20:18,670 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 55 transitions. Word has length 10 [2020-12-09 08:20:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,670 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 55 transitions. [2020-12-09 08:20:18,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,671 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 55 transitions. [2020-12-09 08:20:18,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:20:18,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 08:20:18,672 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,672 INFO L82 PathProgramCache]: Analyzing trace with hash 258799873, now seen corresponding path program 1 times [2020-12-09 08:20:18,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593763617] [2020-12-09 08:20:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,708 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 08:20:18,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593763617] [2020-12-09 08:20:18,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561812297] [2020-12-09 08:20:18,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,710 INFO L87 Difference]: Start difference. First operand 33 states and 55 transitions. Second operand 4 states. [2020-12-09 08:20:18,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,728 INFO L93 Difference]: Finished difference Result 55 states and 91 transitions. [2020-12-09 08:20:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 08:20:18,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,729 INFO L225 Difference]: With dead ends: 55 [2020-12-09 08:20:18,729 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 08:20:18,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 08:20:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-12-09 08:20:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 54 transitions. [2020-12-09 08:20:18,734 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 54 transitions. Word has length 11 [2020-12-09 08:20:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,734 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 54 transitions. [2020-12-09 08:20:18,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 54 transitions. [2020-12-09 08:20:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 08:20:18,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 08:20:18,736 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash -566924772, now seen corresponding path program 1 times [2020-12-09 08:20:18,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349823352] [2020-12-09 08:20:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:20:18,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349823352] [2020-12-09 08:20:18,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774979944] [2020-12-09 08:20:18,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,772 INFO L87 Difference]: Start difference. First operand 33 states and 54 transitions. Second operand 4 states. [2020-12-09 08:20:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,788 INFO L93 Difference]: Finished difference Result 53 states and 86 transitions. [2020-12-09 08:20:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-09 08:20:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,789 INFO L225 Difference]: With dead ends: 53 [2020-12-09 08:20:18,789 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 08:20:18,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 08:20:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2020-12-09 08:20:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 53 transitions. [2020-12-09 08:20:18,793 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 53 transitions. Word has length 12 [2020-12-09 08:20:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,793 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 53 transitions. [2020-12-09 08:20:18,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 53 transitions. [2020-12-09 08:20:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 08:20:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 08:20:18,794 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash -394584650, now seen corresponding path program 1 times [2020-12-09 08:20:18,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94313204] [2020-12-09 08:20:18,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,823 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 08:20:18,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94313204] [2020-12-09 08:20:18,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892712604] [2020-12-09 08:20:18,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,824 INFO L87 Difference]: Start difference. First operand 33 states and 53 transitions. Second operand 4 states. [2020-12-09 08:20:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,838 INFO L93 Difference]: Finished difference Result 51 states and 81 transitions. [2020-12-09 08:20:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-09 08:20:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,839 INFO L225 Difference]: With dead ends: 51 [2020-12-09 08:20:18,839 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 08:20:18,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 08:20:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2020-12-09 08:20:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2020-12-09 08:20:18,842 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 13 [2020-12-09 08:20:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,842 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2020-12-09 08:20:18,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2020-12-09 08:20:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 08:20:18,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 08:20:18,843 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash 652992177, now seen corresponding path program 1 times [2020-12-09 08:20:18,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573989055] [2020-12-09 08:20:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,867 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 08:20:18,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573989055] [2020-12-09 08:20:18,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073895499] [2020-12-09 08:20:18,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,869 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand 4 states. [2020-12-09 08:20:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,882 INFO L93 Difference]: Finished difference Result 49 states and 76 transitions. [2020-12-09 08:20:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-09 08:20:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,883 INFO L225 Difference]: With dead ends: 49 [2020-12-09 08:20:18,883 INFO L226 Difference]: Without dead ends: 47 [2020-12-09 08:20:18,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-09 08:20:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2020-12-09 08:20:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2020-12-09 08:20:18,886 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 14 [2020-12-09 08:20:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,887 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2020-12-09 08:20:18,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2020-12-09 08:20:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 08:20:18,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 08:20:18,888 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1231864213, now seen corresponding path program 1 times [2020-12-09 08:20:18,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257707579] [2020-12-09 08:20:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,910 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 08:20:18,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257707579] [2020-12-09 08:20:18,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413323045] [2020-12-09 08:20:18,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,912 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand 4 states. [2020-12-09 08:20:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,925 INFO L93 Difference]: Finished difference Result 47 states and 71 transitions. [2020-12-09 08:20:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 08:20:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,926 INFO L225 Difference]: With dead ends: 47 [2020-12-09 08:20:18,926 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 08:20:18,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 08:20:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2020-12-09 08:20:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2020-12-09 08:20:18,929 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 15 [2020-12-09 08:20:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,929 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 50 transitions. [2020-12-09 08:20:18,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 50 transitions. [2020-12-09 08:20:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 08:20:18,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 08:20:18,930 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 467130182, now seen corresponding path program 1 times [2020-12-09 08:20:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64222229] [2020-12-09 08:20:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:18,952 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 08:20:18,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64222229] [2020-12-09 08:20:18,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:18,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380876691] [2020-12-09 08:20:18,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:18,954 INFO L87 Difference]: Start difference. First operand 33 states and 50 transitions. Second operand 4 states. [2020-12-09 08:20:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:18,968 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2020-12-09 08:20:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:18,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-09 08:20:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:18,969 INFO L225 Difference]: With dead ends: 45 [2020-12-09 08:20:18,969 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 08:20:18,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 08:20:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-12-09 08:20:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2020-12-09 08:20:18,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 16 [2020-12-09 08:20:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:18,972 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2020-12-09 08:20:18,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2020-12-09 08:20:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 08:20:18,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:18,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:18,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 08:20:18,974 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:18,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1596349216, now seen corresponding path program 1 times [2020-12-09 08:20:18,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:18,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543171528] [2020-12-09 08:20:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:20:19,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543171528] [2020-12-09 08:20:19,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:19,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567766394] [2020-12-09 08:20:19,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:19,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:19,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:19,005 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 4 states. [2020-12-09 08:20:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:19,019 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-12-09 08:20:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:19,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-09 08:20:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:19,020 INFO L225 Difference]: With dead ends: 43 [2020-12-09 08:20:19,020 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 08:20:19,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 08:20:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-12-09 08:20:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 48 transitions. [2020-12-09 08:20:19,023 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 48 transitions. Word has length 17 [2020-12-09 08:20:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:19,023 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 48 transitions. [2020-12-09 08:20:19,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 48 transitions. [2020-12-09 08:20:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 08:20:19,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:19,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:19,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 08:20:19,024 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2052566053, now seen corresponding path program 1 times [2020-12-09 08:20:19,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:19,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224188770] [2020-12-09 08:20:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:19,057 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 08:20:19,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224188770] [2020-12-09 08:20:19,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:19,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:19,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603431364] [2020-12-09 08:20:19,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:19,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:19,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:19,058 INFO L87 Difference]: Start difference. First operand 33 states and 48 transitions. Second operand 4 states. [2020-12-09 08:20:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:19,070 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2020-12-09 08:20:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:19,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 08:20:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:19,072 INFO L225 Difference]: With dead ends: 41 [2020-12-09 08:20:19,072 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 08:20:19,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:19,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 08:20:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-12-09 08:20:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 08:20:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2020-12-09 08:20:19,075 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 18 [2020-12-09 08:20:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:19,075 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2020-12-09 08:20:19,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2020-12-09 08:20:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 08:20:19,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:20:19,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:20:19,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 08:20:19,076 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:20:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:20:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash 795177941, now seen corresponding path program 1 times [2020-12-09 08:20:19,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:20:19,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335430986] [2020-12-09 08:20:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:20:19,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:20:19,105 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 08:20:19,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335430986] [2020-12-09 08:20:19,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:20:19,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 08:20:19,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338802085] [2020-12-09 08:20:19,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:20:19,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:20:19,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:20:19,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:20:19,107 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand 4 states. [2020-12-09 08:20:19,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:20:19,120 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2020-12-09 08:20:19,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:20:19,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-09 08:20:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:20:19,121 INFO L225 Difference]: With dead ends: 35 [2020-12-09 08:20:19,121 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 08:20:19,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 08:20:19,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 08:20:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 08:20:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 08:20:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 08:20:19,122 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-12-09 08:20:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:20:19,122 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 08:20:19,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:20:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 08:20:19,122 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 08:20:19,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 08:20:19,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 08:20:19,134 INFO L265 CegarLoopResult]: At program point L217(lines 7 221) the Hoare annotation is: true [2020-12-09 08:20:19,134 INFO L262 CegarLoopResult]: For program point L151-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L201-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L152(line 152) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L202(line 202) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L186-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L265 CegarLoopResult]: At program point L220(lines 6 221) the Hoare annotation is: true [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L187(line 187) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L55(lines 55 57) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L171-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L172(line 172) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L156-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L206-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L140-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L157(line 157) no Hoare annotation was computed. [2020-12-09 08:20:19,135 INFO L262 CegarLoopResult]: For program point L207(line 207) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L191-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L192(line 192) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L176-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L177(line 177) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L161-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L265 CegarLoopResult]: At program point L211-1(lines 53 216) the Hoare annotation is: true [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L162(line 162) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L212(line 212) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L258 CegarLoopResult]: At program point L212-1(lines 7 221) the Hoare annotation is: false [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L146-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L196-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L147(line 147) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L197(line 197) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 219) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L181-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,136 INFO L262 CegarLoopResult]: For program point L182(line 182) no Hoare annotation was computed. [2020-12-09 08:20:19,137 INFO L262 CegarLoopResult]: For program point L166-1(lines 53 216) no Hoare annotation was computed. [2020-12-09 08:20:19,137 INFO L262 CegarLoopResult]: For program point L167(line 167) no Hoare annotation was computed. [2020-12-09 08:20:19,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:20:19 BoogieIcfgContainer [2020-12-09 08:20:19,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:20:19,144 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:20:19,144 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:20:19,145 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:20:19,145 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:20:18" (3/4) ... [2020-12-09 08:20:19,147 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 08:20:19,158 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-12-09 08:20:19,159 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 08:20:19,159 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-09 08:20:19,160 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 08:20:19,216 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d26ab80-57b2-415b-8998-f10881497f9e/bin/utaipan/witness.graphml [2020-12-09 08:20:19,217 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:20:19,218 INFO L168 Benchmark]: Toolchain (without parser) took 1940.93 ms. Allocated memory was 123.7 MB in the beginning and 151.0 MB in the end (delta: 27.3 MB). Free memory was 85.8 MB in the beginning and 102.5 MB in the end (delta: -16.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:20:19,219 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 123.7 MB. Free memory was 102.2 MB in the beginning and 102.2 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:20:19,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.54 ms. Allocated memory is still 123.7 MB. Free memory was 85.5 MB in the beginning and 97.8 MB in the end (delta: -12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:20:19,219 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.01 ms. Allocated memory is still 123.7 MB. Free memory was 97.8 MB in the beginning and 96.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:20:19,220 INFO L168 Benchmark]: Boogie Preprocessor took 25.05 ms. Allocated memory is still 123.7 MB. Free memory was 96.2 MB in the beginning and 94.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:20:19,220 INFO L168 Benchmark]: RCFGBuilder took 498.19 ms. Allocated memory is still 123.7 MB. Free memory was 94.7 MB in the beginning and 92.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. [2020-12-09 08:20:19,220 INFO L168 Benchmark]: TraceAbstraction took 1100.61 ms. Allocated memory was 123.7 MB in the beginning and 151.0 MB in the end (delta: 27.3 MB). Free memory was 92.7 MB in the beginning and 106.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-12-09 08:20:19,221 INFO L168 Benchmark]: Witness Printer took 72.42 ms. Allocated memory is still 151.0 MB. Free memory was 106.7 MB in the beginning and 102.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:20:19,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 123.7 MB. Free memory was 102.2 MB in the beginning and 102.2 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 203.54 ms. Allocated memory is still 123.7 MB. Free memory was 85.5 MB in the beginning and 97.8 MB in the end (delta: -12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.01 ms. Allocated memory is still 123.7 MB. Free memory was 97.8 MB in the beginning and 96.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.05 ms. Allocated memory is still 123.7 MB. Free memory was 96.2 MB in the beginning and 94.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 498.19 ms. Allocated memory is still 123.7 MB. Free memory was 94.7 MB in the beginning and 92.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 51.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1100.61 ms. Allocated memory was 123.7 MB in the beginning and 151.0 MB in the end (delta: 27.3 MB). Free memory was 92.7 MB in the beginning and 106.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Witness Printer took 72.42 ms. Allocated memory is still 151.0 MB. Free memory was 106.7 MB in the beginning and 102.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 219]: 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: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 712 SDtfs, 604 SDslu, 1061 SDs, 0 SdLazy, 126 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 234 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 11011 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 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...