./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c -s /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/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 9f75fa2e9def7f0d516fdc877ae1f37f4d5f7bd5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:42:25,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:42:25,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:42:25,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:42:25,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:42:25,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:42:25,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:42:25,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:42:25,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:42:25,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:42:25,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:42:25,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:42:25,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:42:25,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:42:25,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:42:25,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:42:25,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:42:25,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:42:25,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:42:25,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:42:25,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:42:25,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:42:25,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:42:25,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:42:25,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:42:25,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:42:25,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:42:25,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:42:25,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:42:25,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:42:25,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:42:25,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:42:25,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:42:25,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:42:25,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:42:25,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:42:25,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:42:25,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:42:25,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:42:25,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:42:25,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:42:25,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:42:25,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:42:25,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:42:25,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:42:25,636 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:42:25,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:42:25,637 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:42:25,637 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:42:25,637 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:42:25,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:42:25,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:42:25,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:42:25,638 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:42:25,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:42:25,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:42:25,639 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:42:25,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:42:25,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:42:25,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:42:25,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:42:25,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:42:25,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:42:25,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:42:25,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:42:25,642 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:42:25,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:42:25,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:42:25,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:42:25,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:42:25,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:42:25,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:42:25,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:42:25,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:25,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:42:25,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:42:25,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:42:25,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:42:25,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:42:25,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:42:25,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:42:25,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:42:25,647 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_26c614d3-058b-4000-a4fc-023187a5a772/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f75fa2e9def7f0d516fdc877ae1f37f4d5f7bd5 [2020-11-28 07:42:25,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:42:25,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:42:25,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:42:25,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:42:25,978 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:42:25,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/../../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2020-11-28 07:42:26,074 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/data/2c4f6250b/b157f966a2dc47409d3bab6fd3ab5cdb/FLAG17471bc4f [2020-11-28 07:42:26,494 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:42:26,495 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2020-11-28 07:42:26,507 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/data/2c4f6250b/b157f966a2dc47409d3bab6fd3ab5cdb/FLAG17471bc4f [2020-11-28 07:42:26,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/data/2c4f6250b/b157f966a2dc47409d3bab6fd3ab5cdb [2020-11-28 07:42:26,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:42:26,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:42:26,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:26,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:42:26,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:42:26,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:26" (1/1) ... [2020-11-28 07:42:26,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a8be72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:26, skipping insertion in model container [2020-11-28 07:42:26,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:42:26" (1/1) ... [2020-11-28 07:42:26,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:42:26,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:42:27,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:27,177 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:42:27,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:42:27,262 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:42:27,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27 WrapperNode [2020-11-28 07:42:27,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:42:27,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:27,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:42:27,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:42:27,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:42:27,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:42:27,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:42:27,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:42:27,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... [2020-11-28 07:42:27,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:42:27,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:42:27,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:42:27,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:42:27,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:42:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:42:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:42:27,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:42:27,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:42:27,851 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-11-28 07:42:28,684 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-11-28 07:42:28,685 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-11-28 07:42:29,146 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:42:29,146 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:42:29,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:29 BoogieIcfgContainer [2020-11-28 07:42:29,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:42:29,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:42:29,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:42:29,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:42:29,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:42:26" (1/3) ... [2020-11-28 07:42:29,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2f2614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:29, skipping insertion in model container [2020-11-28 07:42:29,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:42:27" (2/3) ... [2020-11-28 07:42:29,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2f2614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:42:29, skipping insertion in model container [2020-11-28 07:42:29,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:29" (3/3) ... [2020-11-28 07:42:29,161 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-11-28 07:42:29,176 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:42:29,181 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:42:29,193 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:42:29,236 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:42:29,237 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:42:29,237 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:42:29,237 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:42:29,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:42:29,237 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:42:29,237 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:42:29,237 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:42:29,253 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2020-11-28 07:42:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:42:29,276 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:29,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:29,278 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:29,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:29,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2071582476, now seen corresponding path program 1 times [2020-11-28 07:42:29,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:29,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603170318] [2020-11-28 07:42:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:29,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603170318] [2020-11-28 07:42:29,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:29,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:29,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969792795] [2020-11-28 07:42:29,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:29,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:29,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:29,589 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 3 states. [2020-11-28 07:42:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:29,896 INFO L93 Difference]: Finished difference Result 246 states and 428 transitions. [2020-11-28 07:42:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:29,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-28 07:42:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:29,910 INFO L225 Difference]: With dead ends: 246 [2020-11-28 07:42:29,911 INFO L226 Difference]: Without dead ends: 130 [2020-11-28 07:42:29,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-28 07:42:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2020-11-28 07:42:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-28 07:42:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 194 transitions. [2020-11-28 07:42:29,964 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 194 transitions. Word has length 16 [2020-11-28 07:42:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:29,965 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 194 transitions. [2020-11-28 07:42:29,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 194 transitions. [2020-11-28 07:42:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:42:29,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:29,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:29,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:42:29,967 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:29,967 INFO L82 PathProgramCache]: Analyzing trace with hash -91326719, now seen corresponding path program 1 times [2020-11-28 07:42:29,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:29,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448336722] [2020-11-28 07:42:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:30,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448336722] [2020-11-28 07:42:30,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:30,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:30,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501857971] [2020-11-28 07:42:30,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:30,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:30,080 INFO L87 Difference]: Start difference. First operand 128 states and 194 transitions. Second operand 3 states. [2020-11-28 07:42:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:30,371 INFO L93 Difference]: Finished difference Result 265 states and 398 transitions. [2020-11-28 07:42:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:30,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-28 07:42:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:30,375 INFO L225 Difference]: With dead ends: 265 [2020-11-28 07:42:30,375 INFO L226 Difference]: Without dead ends: 139 [2020-11-28 07:42:30,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-28 07:42:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2020-11-28 07:42:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-11-28 07:42:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 195 transitions. [2020-11-28 07:42:30,406 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 195 transitions. Word has length 18 [2020-11-28 07:42:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:30,407 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 195 transitions. [2020-11-28 07:42:30,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 195 transitions. [2020-11-28 07:42:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:42:30,408 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:30,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:30,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:42:30,408 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2015476492, now seen corresponding path program 1 times [2020-11-28 07:42:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:30,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121352] [2020-11-28 07:42:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:30,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121352] [2020-11-28 07:42:30,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:30,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:30,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867752328] [2020-11-28 07:42:30,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:30,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:30,512 INFO L87 Difference]: Start difference. First operand 129 states and 195 transitions. Second operand 3 states. [2020-11-28 07:42:30,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:30,737 INFO L93 Difference]: Finished difference Result 277 states and 419 transitions. [2020-11-28 07:42:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:30,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-28 07:42:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:30,740 INFO L225 Difference]: With dead ends: 277 [2020-11-28 07:42:30,740 INFO L226 Difference]: Without dead ends: 150 [2020-11-28 07:42:30,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-28 07:42:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2020-11-28 07:42:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-11-28 07:42:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 222 transitions. [2020-11-28 07:42:30,763 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 222 transitions. Word has length 18 [2020-11-28 07:42:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:30,763 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 222 transitions. [2020-11-28 07:42:30,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:30,764 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 222 transitions. [2020-11-28 07:42:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:42:30,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:30,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:30,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:42:30,765 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:30,766 INFO L82 PathProgramCache]: Analyzing trace with hash -500233493, now seen corresponding path program 1 times [2020-11-28 07:42:30,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:30,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381752497] [2020-11-28 07:42:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:30,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381752497] [2020-11-28 07:42:30,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:30,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:30,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561430876] [2020-11-28 07:42:30,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:30,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:30,873 INFO L87 Difference]: Start difference. First operand 146 states and 222 transitions. Second operand 3 states. [2020-11-28 07:42:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:31,093 INFO L93 Difference]: Finished difference Result 298 states and 455 transitions. [2020-11-28 07:42:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:31,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-28 07:42:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:31,096 INFO L225 Difference]: With dead ends: 298 [2020-11-28 07:42:31,096 INFO L226 Difference]: Without dead ends: 154 [2020-11-28 07:42:31,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-28 07:42:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-11-28 07:42:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 07:42:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 233 transitions. [2020-11-28 07:42:31,120 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 233 transitions. Word has length 18 [2020-11-28 07:42:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:31,121 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 233 transitions. [2020-11-28 07:42:31,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 233 transitions. [2020-11-28 07:42:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:42:31,122 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:31,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:31,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:42:31,124 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:31,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1405682290, now seen corresponding path program 1 times [2020-11-28 07:42:31,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:31,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163354008] [2020-11-28 07:42:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:31,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163354008] [2020-11-28 07:42:31,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:31,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:31,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704504172] [2020-11-28 07:42:31,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:31,203 INFO L87 Difference]: Start difference. First operand 152 states and 233 transitions. Second operand 3 states. [2020-11-28 07:42:31,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:31,455 INFO L93 Difference]: Finished difference Result 312 states and 474 transitions. [2020-11-28 07:42:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:31,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-28 07:42:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:31,458 INFO L225 Difference]: With dead ends: 312 [2020-11-28 07:42:31,458 INFO L226 Difference]: Without dead ends: 162 [2020-11-28 07:42:31,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-28 07:42:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2020-11-28 07:42:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 07:42:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 231 transitions. [2020-11-28 07:42:31,470 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 231 transitions. Word has length 19 [2020-11-28 07:42:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:31,470 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 231 transitions. [2020-11-28 07:42:31,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 231 transitions. [2020-11-28 07:42:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:42:31,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:31,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:31,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:42:31,486 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:31,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1233855935, now seen corresponding path program 1 times [2020-11-28 07:42:31,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:31,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77647098] [2020-11-28 07:42:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:31,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77647098] [2020-11-28 07:42:31,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:31,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:31,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074620647] [2020-11-28 07:42:31,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:31,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:31,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:31,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:31,546 INFO L87 Difference]: Start difference. First operand 152 states and 231 transitions. Second operand 3 states. [2020-11-28 07:42:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:31,722 INFO L93 Difference]: Finished difference Result 306 states and 463 transitions. [2020-11-28 07:42:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:31,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-28 07:42:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:31,724 INFO L225 Difference]: With dead ends: 306 [2020-11-28 07:42:31,724 INFO L226 Difference]: Without dead ends: 156 [2020-11-28 07:42:31,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-11-28 07:42:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-11-28 07:42:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 07:42:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 230 transitions. [2020-11-28 07:42:31,738 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 230 transitions. Word has length 19 [2020-11-28 07:42:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:31,739 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 230 transitions. [2020-11-28 07:42:31,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 230 transitions. [2020-11-28 07:42:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 07:42:31,739 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:31,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:31,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:42:31,740 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1728825156, now seen corresponding path program 1 times [2020-11-28 07:42:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:31,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494186857] [2020-11-28 07:42:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494186857] [2020-11-28 07:42:31,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:31,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:31,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657268868] [2020-11-28 07:42:31,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:31,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:31,808 INFO L87 Difference]: Start difference. First operand 152 states and 230 transitions. Second operand 3 states. [2020-11-28 07:42:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:31,974 INFO L93 Difference]: Finished difference Result 312 states and 468 transitions. [2020-11-28 07:42:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:31,975 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-28 07:42:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:31,976 INFO L225 Difference]: With dead ends: 312 [2020-11-28 07:42:31,976 INFO L226 Difference]: Without dead ends: 162 [2020-11-28 07:42:31,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-28 07:42:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2020-11-28 07:42:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 07:42:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 228 transitions. [2020-11-28 07:42:31,986 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 228 transitions. Word has length 20 [2020-11-28 07:42:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:31,987 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 228 transitions. [2020-11-28 07:42:31,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 228 transitions. [2020-11-28 07:42:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:42:31,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:31,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:31,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:42:31,988 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1389145239, now seen corresponding path program 1 times [2020-11-28 07:42:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:31,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91867022] [2020-11-28 07:42:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:32,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91867022] [2020-11-28 07:42:32,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:32,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:32,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132861681] [2020-11-28 07:42:32,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:32,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:32,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:32,043 INFO L87 Difference]: Start difference. First operand 152 states and 228 transitions. Second operand 3 states. [2020-11-28 07:42:32,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:32,203 INFO L93 Difference]: Finished difference Result 312 states and 464 transitions. [2020-11-28 07:42:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:32,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-28 07:42:32,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:32,205 INFO L225 Difference]: With dead ends: 312 [2020-11-28 07:42:32,205 INFO L226 Difference]: Without dead ends: 162 [2020-11-28 07:42:32,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:32,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-28 07:42:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2020-11-28 07:42:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 07:42:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 226 transitions. [2020-11-28 07:42:32,213 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 226 transitions. Word has length 21 [2020-11-28 07:42:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:32,213 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 226 transitions. [2020-11-28 07:42:32,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 226 transitions. [2020-11-28 07:42:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 07:42:32,214 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:32,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:32,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:42:32,215 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:32,215 INFO L82 PathProgramCache]: Analyzing trace with hash 130354257, now seen corresponding path program 1 times [2020-11-28 07:42:32,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:32,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756202781] [2020-11-28 07:42:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756202781] [2020-11-28 07:42:32,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:32,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:42:32,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338458864] [2020-11-28 07:42:32,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:42:32,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:42:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:42:32,263 INFO L87 Difference]: Start difference. First operand 152 states and 226 transitions. Second operand 4 states. [2020-11-28 07:42:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:32,587 INFO L93 Difference]: Finished difference Result 443 states and 660 transitions. [2020-11-28 07:42:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:42:32,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-11-28 07:42:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:32,589 INFO L225 Difference]: With dead ends: 443 [2020-11-28 07:42:32,589 INFO L226 Difference]: Without dead ends: 293 [2020-11-28 07:42:32,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:42:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-11-28 07:42:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 267. [2020-11-28 07:42:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-11-28 07:42:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 404 transitions. [2020-11-28 07:42:32,609 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 404 transitions. Word has length 21 [2020-11-28 07:42:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:32,613 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 404 transitions. [2020-11-28 07:42:32,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:42:32,613 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 404 transitions. [2020-11-28 07:42:32,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 07:42:32,617 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:32,617 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:32,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:42:32,617 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash 905395413, now seen corresponding path program 1 times [2020-11-28 07:42:32,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:32,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515418450] [2020-11-28 07:42:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:32,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515418450] [2020-11-28 07:42:32,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:32,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020187330] [2020-11-28 07:42:32,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:32,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:32,652 INFO L87 Difference]: Start difference. First operand 267 states and 404 transitions. Second operand 3 states. [2020-11-28 07:42:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:32,667 INFO L93 Difference]: Finished difference Result 532 states and 806 transitions. [2020-11-28 07:42:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:32,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-11-28 07:42:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:32,669 INFO L225 Difference]: With dead ends: 532 [2020-11-28 07:42:32,669 INFO L226 Difference]: Without dead ends: 267 [2020-11-28 07:42:32,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-11-28 07:42:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2020-11-28 07:42:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-11-28 07:42:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 397 transitions. [2020-11-28 07:42:32,685 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 397 transitions. Word has length 35 [2020-11-28 07:42:32,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:32,685 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 397 transitions. [2020-11-28 07:42:32,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 397 transitions. [2020-11-28 07:42:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 07:42:32,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:32,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:32,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:42:32,687 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:32,688 INFO L82 PathProgramCache]: Analyzing trace with hash -210842928, now seen corresponding path program 1 times [2020-11-28 07:42:32,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:32,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056010095] [2020-11-28 07:42:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:32,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056010095] [2020-11-28 07:42:32,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:32,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:32,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574707542] [2020-11-28 07:42:32,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:32,740 INFO L87 Difference]: Start difference. First operand 267 states and 397 transitions. Second operand 3 states. [2020-11-28 07:42:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:32,774 INFO L93 Difference]: Finished difference Result 541 states and 803 transitions. [2020-11-28 07:42:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:32,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-11-28 07:42:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:32,777 INFO L225 Difference]: With dead ends: 541 [2020-11-28 07:42:32,777 INFO L226 Difference]: Without dead ends: 276 [2020-11-28 07:42:32,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-11-28 07:42:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2020-11-28 07:42:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-11-28 07:42:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 400 transitions. [2020-11-28 07:42:32,793 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 400 transitions. Word has length 36 [2020-11-28 07:42:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:32,794 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 400 transitions. [2020-11-28 07:42:32,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 400 transitions. [2020-11-28 07:42:32,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 07:42:32,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:32,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:32,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:42:32,796 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1619187920, now seen corresponding path program 1 times [2020-11-28 07:42:32,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:32,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479656504] [2020-11-28 07:42:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:32,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479656504] [2020-11-28 07:42:32,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:32,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:32,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927074441] [2020-11-28 07:42:32,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:32,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:32,857 INFO L87 Difference]: Start difference. First operand 275 states and 400 transitions. Second operand 3 states. [2020-11-28 07:42:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:33,087 INFO L93 Difference]: Finished difference Result 627 states and 931 transitions. [2020-11-28 07:42:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:33,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-11-28 07:42:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:33,090 INFO L225 Difference]: With dead ends: 627 [2020-11-28 07:42:33,091 INFO L226 Difference]: Without dead ends: 354 [2020-11-28 07:42:33,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-11-28 07:42:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 342. [2020-11-28 07:42:33,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-11-28 07:42:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 514 transitions. [2020-11-28 07:42:33,111 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 514 transitions. Word has length 37 [2020-11-28 07:42:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:33,112 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 514 transitions. [2020-11-28 07:42:33,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 514 transitions. [2020-11-28 07:42:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-28 07:42:33,113 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:33,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:33,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 07:42:33,113 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash -606179650, now seen corresponding path program 1 times [2020-11-28 07:42:33,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:33,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225711123] [2020-11-28 07:42:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:33,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225711123] [2020-11-28 07:42:33,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:33,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:42:33,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524213525] [2020-11-28 07:42:33,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:33,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:33,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,173 INFO L87 Difference]: Start difference. First operand 342 states and 514 transitions. Second operand 3 states. [2020-11-28 07:42:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:33,415 INFO L93 Difference]: Finished difference Result 690 states and 1037 transitions. [2020-11-28 07:42:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:33,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-11-28 07:42:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:33,422 INFO L225 Difference]: With dead ends: 690 [2020-11-28 07:42:33,422 INFO L226 Difference]: Without dead ends: 350 [2020-11-28 07:42:33,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-11-28 07:42:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2020-11-28 07:42:33,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-11-28 07:42:33,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 514 transitions. [2020-11-28 07:42:33,444 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 514 transitions. Word has length 38 [2020-11-28 07:42:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:33,444 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 514 transitions. [2020-11-28 07:42:33,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 514 transitions. [2020-11-28 07:42:33,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-28 07:42:33,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:33,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:33,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 07:42:33,446 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1667419393, now seen corresponding path program 1 times [2020-11-28 07:42:33,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:33,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605102439] [2020-11-28 07:42:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:33,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605102439] [2020-11-28 07:42:33,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:33,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:42:33,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994980691] [2020-11-28 07:42:33,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:33,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,498 INFO L87 Difference]: Start difference. First operand 343 states and 514 transitions. Second operand 3 states. [2020-11-28 07:42:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:33,784 INFO L93 Difference]: Finished difference Result 749 states and 1124 transitions. [2020-11-28 07:42:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:33,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2020-11-28 07:42:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:33,787 INFO L225 Difference]: With dead ends: 749 [2020-11-28 07:42:33,787 INFO L226 Difference]: Without dead ends: 408 [2020-11-28 07:42:33,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-11-28 07:42:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 382. [2020-11-28 07:42:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-11-28 07:42:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 562 transitions. [2020-11-28 07:42:33,809 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 562 transitions. Word has length 39 [2020-11-28 07:42:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:33,809 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 562 transitions. [2020-11-28 07:42:33,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 562 transitions. [2020-11-28 07:42:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-28 07:42:33,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:33,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:33,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 07:42:33,811 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:33,811 INFO L82 PathProgramCache]: Analyzing trace with hash -654965989, now seen corresponding path program 1 times [2020-11-28 07:42:33,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:33,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792832564] [2020-11-28 07:42:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:33,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792832564] [2020-11-28 07:42:33,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:33,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:42:33,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470235944] [2020-11-28 07:42:33,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:33,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:33,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:33,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,857 INFO L87 Difference]: Start difference. First operand 382 states and 562 transitions. Second operand 3 states. [2020-11-28 07:42:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:33,901 INFO L93 Difference]: Finished difference Result 1109 states and 1621 transitions. [2020-11-28 07:42:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:33,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-11-28 07:42:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:33,907 INFO L225 Difference]: With dead ends: 1109 [2020-11-28 07:42:33,907 INFO L226 Difference]: Without dead ends: 729 [2020-11-28 07:42:33,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2020-11-28 07:42:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 634. [2020-11-28 07:42:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 634 states. [2020-11-28 07:42:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 920 transitions. [2020-11-28 07:42:33,942 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 920 transitions. Word has length 42 [2020-11-28 07:42:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:33,942 INFO L481 AbstractCegarLoop]: Abstraction has 634 states and 920 transitions. [2020-11-28 07:42:33,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 920 transitions. [2020-11-28 07:42:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-28 07:42:33,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:33,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:33,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 07:42:33,944 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1507280612, now seen corresponding path program 1 times [2020-11-28 07:42:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:33,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27991029] [2020-11-28 07:42:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:42:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:42:33,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27991029] [2020-11-28 07:42:33,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:42:33,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:42:33,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180812349] [2020-11-28 07:42:33,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:42:33,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:42:33,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:42:33,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:33,994 INFO L87 Difference]: Start difference. First operand 634 states and 920 transitions. Second operand 3 states. [2020-11-28 07:42:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:42:34,063 INFO L93 Difference]: Finished difference Result 1887 states and 2739 transitions. [2020-11-28 07:42:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:42:34,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-11-28 07:42:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:42:34,071 INFO L225 Difference]: With dead ends: 1887 [2020-11-28 07:42:34,071 INFO L226 Difference]: Without dead ends: 1255 [2020-11-28 07:42:34,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:42:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2020-11-28 07:42:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 898. [2020-11-28 07:42:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-11-28 07:42:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1302 transitions. [2020-11-28 07:42:34,121 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1302 transitions. Word has length 44 [2020-11-28 07:42:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:42:34,122 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1302 transitions. [2020-11-28 07:42:34,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:42:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1302 transitions. [2020-11-28 07:42:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-28 07:42:34,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:42:34,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:42:34,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-28 07:42:34,125 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:42:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:42:34,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1002465112, now seen corresponding path program 1 times [2020-11-28 07:42:34,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:42:34,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672045110] [2020-11-28 07:42:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:42:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:34,145 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:42:34,167 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:42:34,208 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:42:34,208 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:42:34,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-28 07:42:34,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:42:34 BoogieIcfgContainer [2020-11-28 07:42:34,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:42:34,308 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:42:34,308 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:42:34,309 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:42:34,309 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:42:29" (3/4) ... [2020-11-28 07:42:34,311 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:42:34,425 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26c614d3-058b-4000-a4fc-023187a5a772/bin/utaipan/witness.graphml [2020-11-28 07:42:34,425 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:42:34,430 INFO L168 Benchmark]: Toolchain (without parser) took 7560.79 ms. Allocated memory was 88.1 MB in the beginning and 161.5 MB in the end (delta: 73.4 MB). Free memory was 56.4 MB in the beginning and 82.9 MB in the end (delta: -26.5 MB). Peak memory consumption was 46.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:34,431 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:42:34,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 412.50 ms. Allocated memory is still 88.1 MB. Free memory was 56.2 MB in the beginning and 61.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:34,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.47 ms. Allocated memory is still 88.1 MB. Free memory was 61.5 MB in the beginning and 58.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:34,432 INFO L168 Benchmark]: Boogie Preprocessor took 63.01 ms. Allocated memory is still 88.1 MB. Free memory was 58.8 MB in the beginning and 56.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:34,433 INFO L168 Benchmark]: RCFGBuilder took 1697.65 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 56.5 MB in the beginning and 53.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:34,433 INFO L168 Benchmark]: TraceAbstraction took 5157.26 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 52.6 MB in the beginning and 91.3 MB in the end (delta: -38.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:34,433 INFO L168 Benchmark]: Witness Printer took 117.31 ms. Allocated memory is still 161.5 MB. Free memory was 90.2 MB in the beginning and 82.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-28 07:42:34,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 29.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 412.50 ms. Allocated memory is still 88.1 MB. Free memory was 56.2 MB in the beginning and 61.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 104.47 ms. Allocated memory is still 88.1 MB. Free memory was 61.5 MB in the beginning and 58.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.01 ms. Allocated memory is still 88.1 MB. Free memory was 58.8 MB in the beginning and 56.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1697.65 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 56.5 MB in the beginning and 53.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5157.26 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 52.6 MB in the beginning and 91.3 MB in the end (delta: -38.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Witness Printer took 117.31 ms. Allocated memory is still 161.5 MB. Free memory was 90.2 MB in the beginning and 82.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L647] int s ; [L648] int tmp ; [L652] s = 8464 [L13] int s__info_callback = __VERIFIER_nondet_int() ; [L14] int s__in_handshake = __VERIFIER_nondet_int() ; [L15] int s__state ; [L16] int s__new_session ; [L17] int s__server ; [L18] int s__version = __VERIFIER_nondet_int() ; [L19] int s__type ; [L20] int s__init_num ; [L21] int s__hit = __VERIFIER_nondet_int() ; [L22] int s__rwstate ; [L23] int s__init_buf___0 = 1; [L24] int s__debug = __VERIFIER_nondet_int() ; [L25] int s__shutdown ; [L26] int s__cert = __VERIFIER_nondet_int() ; [L27] int s__options = __VERIFIER_nondet_int() ; [L28] int s__verify_mode = __VERIFIER_nondet_int() ; [L29] int s__session__peer = __VERIFIER_nondet_int() ; [L30] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L31] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L35] int s__s3__tmp__cert_request ; [L36] int s__s3__tmp__reuse_message ; [L37] int s__s3__tmp__use_rsa_tmp ; [L38] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L39] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__next_state___0 ; [L41] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L42] int s__session__cipher ; [L43] int buf ; [L44] unsigned long l ; [L45] unsigned long Time ; [L46] unsigned long tmp ; [L47] int cb ; [L48] long num1 = __VERIFIER_nondet_long() ; [L49] int ret ; [L50] int new_state ; [L51] int state ; [L52] int skip ; [L53] int got_new_session ; [L54] int tmp___1 = __VERIFIER_nondet_int() ; [L55] int tmp___2 = __VERIFIER_nondet_int() ; [L56] int tmp___3 = __VERIFIER_nondet_int() ; [L57] int tmp___4 = __VERIFIER_nondet_int() ; [L58] int tmp___5 = __VERIFIER_nondet_int() ; [L59] int tmp___6 = __VERIFIER_nondet_int() ; [L60] int tmp___7 ; [L61] long tmp___8 = __VERIFIER_nondet_long() ; [L62] int tmp___9 = __VERIFIER_nondet_int() ; [L63] int tmp___10 = __VERIFIER_nondet_int() ; [L64] int blastFlag ; [L65] int __cil_tmp55 ; [L66] unsigned long __cil_tmp56 ; [L67] unsigned long __cil_tmp57 ; [L68] unsigned long __cil_tmp58 ; [L69] unsigned long __cil_tmp59 ; [L70] int __cil_tmp60 ; [L71] unsigned long __cil_tmp61 ; [L74] s__s3__tmp__reuse_message = 0 [L75] s__state = initial_state [L76] blastFlag = 0 [L77] tmp = __VERIFIER_nondet_int() [L78] Time = tmp [L79] cb = 0 [L80] ret = -1 [L81] skip = 0 [L82] got_new_session = 0 [L83] COND FALSE !(s__info_callback != 0) [L86] COND FALSE !(s__ctx__info_callback != 0) [L90] s__in_handshake ++ [L91] COND TRUE tmp___1 + 12288 [L92] COND TRUE tmp___2 + 16384 [L96] COND FALSE !(s__cert == 0) [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND TRUE s__state == 8464 [L273] s__shutdown = 0 [L274] ret = __VERIFIER_nondet_int() [L275] COND TRUE blastFlag == 0 [L276] blastFlag = 1 [L278] COND FALSE !(ret <= 0) [L281] got_new_session = 1 [L282] s__state = 8496 [L283] s__init_num = 0 [L604] COND TRUE ! s__s3__tmp__reuse_message [L605] COND TRUE ! skip [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE s__state != 8656 [L608] COND TRUE tmp___2 != -16384 [L609] COND FALSE !(state == 8496) [L616] COND FALSE !(\read(s__debug)) [L622] COND FALSE !(cb != 0) [L631] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND TRUE s__state == 8496 [L287] ret = __VERIFIER_nondet_int() [L288] COND TRUE blastFlag == 1 [L289] blastFlag = 2 [L291] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 8512 [L299] s__init_num = 0 [L604] COND TRUE ! s__s3__tmp__reuse_message [L605] COND TRUE ! skip [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE s__state != 8656 [L608] COND TRUE tmp___2 != -16384 [L609] COND TRUE state == 8496 [L3] __assert_fail("0", "s3_srvr_14.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 112 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.9s, OverallIterations: 17, TraceHistogramMax: 2, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2235 SDtfs, 2347 SDslu, 706 SDs, 0 SdLazy, 1101 SolverSat, 414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=898occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 576 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 486 NumberOfCodeBlocks, 486 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 425 ConstructedInterpolants, 0 QuantifiedInterpolants, 34354 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 70/70 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 incorrect! Received shutdown request...