./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_14-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_14-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e59705ae4b9d6434bb0d27311e7a023ef1b3945 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:06,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:06,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:06,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:06,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:06,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:06,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:06,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:06,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:06,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:06,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:06,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:06,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:06,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:06,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:06,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:06,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:06,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:06,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:06,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:06,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:06,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:06,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:06,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:06,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:06,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:06,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:06,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:06,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:06,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:06,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:06,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:06,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:06,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:06,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:06,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:06,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:06,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:06,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:06,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:06,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:06,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:26:06,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:06,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:06,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:06,769 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:06,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:06,770 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:06,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:06,770 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:06,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:06,777 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:06,778 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:06,778 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:06,778 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:06,779 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:06,779 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:06,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:06,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:06,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:06,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:06,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:06,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:06,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:06,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:06,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:26:06,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:06,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:06,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:06,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:06,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:06,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:06,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:06,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:06,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:06,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:06,785 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:06,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:06,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:06,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:06,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:06,786 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_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e59705ae4b9d6434bb0d27311e7a023ef1b3945 [2021-10-11 02:26:07,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:07,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:07,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:07,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:07,090 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:07,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/locks/test_locks_14-1.c [2021-10-11 02:26:07,156 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/data/f67636261/33e3c6466d004e85a37d9c40659f7e96/FLAGd0822c8d3 [2021-10-11 02:26:07,693 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:07,693 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/sv-benchmarks/c/locks/test_locks_14-1.c [2021-10-11 02:26:07,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/data/f67636261/33e3c6466d004e85a37d9c40659f7e96/FLAGd0822c8d3 [2021-10-11 02:26:08,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/data/f67636261/33e3c6466d004e85a37d9c40659f7e96 [2021-10-11 02:26:08,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:08,051 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:08,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:08,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:08,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:08,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dcf86e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08, skipping insertion in model container [2021-10-11 02:26:08,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:08,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:08,280 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2021-10-11 02:26:08,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:08,293 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:08,321 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2021-10-11 02:26:08,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:08,337 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:08,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08 WrapperNode [2021-10-11 02:26:08,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:08,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:08,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:08,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:08,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:08,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:08,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:08,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:08,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... [2021-10-11 02:26:08,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:08,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:08,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:08,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:08,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:26:08,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:08,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:09,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:09,342 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:26:09,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:09 BoogieIcfgContainer [2021-10-11 02:26:09,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:09,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:09,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:09,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:09,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:08" (1/3) ... [2021-10-11 02:26:09,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3726a832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:09, skipping insertion in model container [2021-10-11 02:26:09,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:08" (2/3) ... [2021-10-11 02:26:09,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3726a832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:09, skipping insertion in model container [2021-10-11 02:26:09,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:09" (3/3) ... [2021-10-11 02:26:09,357 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2021-10-11 02:26:09,371 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:09,374 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:26:09,388 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:26:09,426 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:09,426 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:09,426 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:09,426 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:09,426 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:09,427 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:09,427 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:09,427 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-10-11 02:26:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:26:09,443 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:09,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:26:09,444 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash -96656291, now seen corresponding path program 1 times [2021-10-11 02:26:09,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:09,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393022750] [2021-10-11 02:26:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:09,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393022750] [2021-10-11 02:26:09,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:09,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:09,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051819352] [2021-10-11 02:26:09,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:09,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:09,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:09,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:09,726 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2021-10-11 02:26:09,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:09,803 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-10-11 02:26:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:09,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:26:09,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:09,815 INFO L225 Difference]: With dead ends: 74 [2021-10-11 02:26:09,815 INFO L226 Difference]: Without dead ends: 63 [2021-10-11 02:26:09,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-11 02:26:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 33. [2021-10-11 02:26:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 59 transitions. [2021-10-11 02:26:09,852 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 59 transitions. Word has length 6 [2021-10-11 02:26:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:09,853 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 59 transitions. [2021-10-11 02:26:09,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 59 transitions. [2021-10-11 02:26:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:09,854 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:09,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:09,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:09,854 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1298834327, now seen corresponding path program 1 times [2021-10-11 02:26:09,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:09,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219609987] [2021-10-11 02:26:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:09,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219609987] [2021-10-11 02:26:09,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:09,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:09,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542328982] [2021-10-11 02:26:09,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:09,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:09,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:09,923 INFO L87 Difference]: Start difference. First operand 33 states and 59 transitions. Second operand 4 states. [2021-10-11 02:26:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:09,967 INFO L93 Difference]: Finished difference Result 63 states and 111 transitions. [2021-10-11 02:26:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:09,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:26:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:09,972 INFO L225 Difference]: With dead ends: 63 [2021-10-11 02:26:09,972 INFO L226 Difference]: Without dead ends: 61 [2021-10-11 02:26:09,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-11 02:26:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2021-10-11 02:26:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:09,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 58 transitions. [2021-10-11 02:26:09,979 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 58 transitions. Word has length 7 [2021-10-11 02:26:09,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:09,979 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 58 transitions. [2021-10-11 02:26:09,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:09,980 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 58 transitions. [2021-10-11 02:26:09,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:26:09,980 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:09,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:09,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:09,981 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1609370866, now seen corresponding path program 1 times [2021-10-11 02:26:09,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:09,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335486058] [2021-10-11 02:26:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335486058] [2021-10-11 02:26:10,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952309679] [2021-10-11 02:26:10,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,079 INFO L87 Difference]: Start difference. First operand 33 states and 58 transitions. Second operand 4 states. [2021-10-11 02:26:10,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,121 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2021-10-11 02:26:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:26:10,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,124 INFO L225 Difference]: With dead ends: 61 [2021-10-11 02:26:10,125 INFO L226 Difference]: Without dead ends: 59 [2021-10-11 02:26:10,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-11 02:26:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2021-10-11 02:26:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 57 transitions. [2021-10-11 02:26:10,135 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 57 transitions. Word has length 8 [2021-10-11 02:26:10,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,136 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 57 transitions. [2021-10-11 02:26:10,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,136 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 57 transitions. [2021-10-11 02:26:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:26:10,137 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:10,138 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1648897972, now seen corresponding path program 1 times [2021-10-11 02:26:10,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461774569] [2021-10-11 02:26:10,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461774569] [2021-10-11 02:26:10,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956124864] [2021-10-11 02:26:10,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,257 INFO L87 Difference]: Start difference. First operand 33 states and 57 transitions. Second operand 4 states. [2021-10-11 02:26:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,290 INFO L93 Difference]: Finished difference Result 59 states and 101 transitions. [2021-10-11 02:26:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:26:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,292 INFO L225 Difference]: With dead ends: 59 [2021-10-11 02:26:10,292 INFO L226 Difference]: Without dead ends: 57 [2021-10-11 02:26:10,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-11 02:26:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-10-11 02:26:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-10-11 02:26:10,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 9 [2021-10-11 02:26:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,298 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-10-11 02:26:10,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-10-11 02:26:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:26:10,298 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:26:10,299 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 423983495, now seen corresponding path program 1 times [2021-10-11 02:26:10,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382422841] [2021-10-11 02:26:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382422841] [2021-10-11 02:26:10,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911733765] [2021-10-11 02:26:10,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,369 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand 4 states. [2021-10-11 02:26:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,396 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2021-10-11 02:26:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 02:26:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,400 INFO L225 Difference]: With dead ends: 57 [2021-10-11 02:26:10,400 INFO L226 Difference]: Without dead ends: 55 [2021-10-11 02:26:10,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-11 02:26:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-10-11 02:26:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 55 transitions. [2021-10-11 02:26:10,405 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 55 transitions. Word has length 10 [2021-10-11 02:26:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,406 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 55 transitions. [2021-10-11 02:26:10,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 55 transitions. [2021-10-11 02:26:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:26:10,406 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:26:10,407 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash 258799873, now seen corresponding path program 1 times [2021-10-11 02:26:10,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713846228] [2021-10-11 02:26:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713846228] [2021-10-11 02:26:10,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313640649] [2021-10-11 02:26:10,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,454 INFO L87 Difference]: Start difference. First operand 33 states and 55 transitions. Second operand 4 states. [2021-10-11 02:26:10,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,473 INFO L93 Difference]: Finished difference Result 55 states and 91 transitions. [2021-10-11 02:26:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:26:10,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,475 INFO L225 Difference]: With dead ends: 55 [2021-10-11 02:26:10,475 INFO L226 Difference]: Without dead ends: 53 [2021-10-11 02:26:10,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-11 02:26:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2021-10-11 02:26:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 54 transitions. [2021-10-11 02:26:10,480 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 54 transitions. Word has length 11 [2021-10-11 02:26:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,481 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 54 transitions. [2021-10-11 02:26:10,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 54 transitions. [2021-10-11 02:26:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:26:10,482 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:26:10,482 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,483 INFO L82 PathProgramCache]: Analyzing trace with hash -566924772, now seen corresponding path program 1 times [2021-10-11 02:26:10,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2508054] [2021-10-11 02:26:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2508054] [2021-10-11 02:26:10,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998767730] [2021-10-11 02:26:10,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,522 INFO L87 Difference]: Start difference. First operand 33 states and 54 transitions. Second operand 4 states. [2021-10-11 02:26:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,549 INFO L93 Difference]: Finished difference Result 53 states and 86 transitions. [2021-10-11 02:26:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:26:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,551 INFO L225 Difference]: With dead ends: 53 [2021-10-11 02:26:10,551 INFO L226 Difference]: Without dead ends: 51 [2021-10-11 02:26:10,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-11 02:26:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2021-10-11 02:26:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 53 transitions. [2021-10-11 02:26:10,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 53 transitions. Word has length 12 [2021-10-11 02:26:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,562 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 53 transitions. [2021-10-11 02:26:10,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 53 transitions. [2021-10-11 02:26:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:26:10,567 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:26:10,567 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash -394584650, now seen corresponding path program 1 times [2021-10-11 02:26:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348293868] [2021-10-11 02:26:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348293868] [2021-10-11 02:26:10,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971504860] [2021-10-11 02:26:10,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,633 INFO L87 Difference]: Start difference. First operand 33 states and 53 transitions. Second operand 4 states. [2021-10-11 02:26:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,658 INFO L93 Difference]: Finished difference Result 51 states and 81 transitions. [2021-10-11 02:26:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 02:26:10,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,662 INFO L225 Difference]: With dead ends: 51 [2021-10-11 02:26:10,663 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 02:26:10,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 02:26:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-10-11 02:26:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2021-10-11 02:26:10,677 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 13 [2021-10-11 02:26:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,678 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2021-10-11 02:26:10,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2021-10-11 02:26:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:26:10,679 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:26:10,680 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash 652992177, now seen corresponding path program 1 times [2021-10-11 02:26:10,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881670255] [2021-10-11 02:26:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881670255] [2021-10-11 02:26:10,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516514397] [2021-10-11 02:26:10,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,747 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand 4 states. [2021-10-11 02:26:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,775 INFO L93 Difference]: Finished difference Result 49 states and 76 transitions. [2021-10-11 02:26:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,775 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-10-11 02:26:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,776 INFO L225 Difference]: With dead ends: 49 [2021-10-11 02:26:10,776 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 02:26:10,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 02:26:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-10-11 02:26:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2021-10-11 02:26:10,782 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 14 [2021-10-11 02:26:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,782 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2021-10-11 02:26:10,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2021-10-11 02:26:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 02:26:10,787 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:26:10,788 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1231864213, now seen corresponding path program 1 times [2021-10-11 02:26:10,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019475132] [2021-10-11 02:26:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019475132] [2021-10-11 02:26:10,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91835657] [2021-10-11 02:26:10,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,837 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand 4 states. [2021-10-11 02:26:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,853 INFO L93 Difference]: Finished difference Result 47 states and 71 transitions. [2021-10-11 02:26:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-10-11 02:26:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,854 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:26:10,854 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:26:10,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:26:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-10-11 02:26:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2021-10-11 02:26:10,858 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 15 [2021-10-11 02:26:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,858 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 50 transitions. [2021-10-11 02:26:10,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 50 transitions. [2021-10-11 02:26:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:26:10,859 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:26:10,859 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,860 INFO L82 PathProgramCache]: Analyzing trace with hash 467130182, now seen corresponding path program 1 times [2021-10-11 02:26:10,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043384700] [2021-10-11 02:26:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:10,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043384700] [2021-10-11 02:26:10,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:10,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:10,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723767876] [2021-10-11 02:26:10,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:10,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:10,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,947 INFO L87 Difference]: Start difference. First operand 33 states and 50 transitions. Second operand 4 states. [2021-10-11 02:26:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:10,963 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2021-10-11 02:26:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:10,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-10-11 02:26:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:10,965 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:26:10,965 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:26:10,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:26:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-10-11 02:26:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:10,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2021-10-11 02:26:10,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 16 [2021-10-11 02:26:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:10,973 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2021-10-11 02:26:10,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2021-10-11 02:26:10,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:26:10,976 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:10,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:10,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:26:10,977 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:10,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1596349216, now seen corresponding path program 1 times [2021-10-11 02:26:10,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:10,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459458801] [2021-10-11 02:26:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:11,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459458801] [2021-10-11 02:26:11,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:11,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:11,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941994112] [2021-10-11 02:26:11,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:11,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:11,023 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 4 states. [2021-10-11 02:26:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:11,041 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2021-10-11 02:26:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:11,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-10-11 02:26:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:11,043 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:26:11,043 INFO L226 Difference]: Without dead ends: 41 [2021-10-11 02:26:11,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-11 02:26:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-10-11 02:26:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 48 transitions. [2021-10-11 02:26:11,056 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 48 transitions. Word has length 17 [2021-10-11 02:26:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:11,057 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 48 transitions. [2021-10-11 02:26:11,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 48 transitions. [2021-10-11 02:26:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:26:11,061 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:11,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:11,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-11 02:26:11,062 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:11,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2052566053, now seen corresponding path program 1 times [2021-10-11 02:26:11,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:11,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727823033] [2021-10-11 02:26:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:11,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727823033] [2021-10-11 02:26:11,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:11,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:11,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274623951] [2021-10-11 02:26:11,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:11,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:11,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:11,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:11,114 INFO L87 Difference]: Start difference. First operand 33 states and 48 transitions. Second operand 4 states. [2021-10-11 02:26:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:11,134 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-10-11 02:26:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:11,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 02:26:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:11,141 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:26:11,141 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:26:11,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:26:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-10-11 02:26:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-10-11 02:26:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2021-10-11 02:26:11,153 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 18 [2021-10-11 02:26:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:11,154 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2021-10-11 02:26:11,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2021-10-11 02:26:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:26:11,156 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:11,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:11,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-11 02:26:11,157 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:26:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:11,158 INFO L82 PathProgramCache]: Analyzing trace with hash 795177941, now seen corresponding path program 1 times [2021-10-11 02:26:11,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:11,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124774476] [2021-10-11 02:26:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:11,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124774476] [2021-10-11 02:26:11,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:11,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:11,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130070845] [2021-10-11 02:26:11,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:11,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:11,196 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand 4 states. [2021-10-11 02:26:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:11,212 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-10-11 02:26:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:11,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-10-11 02:26:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:11,213 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:26:11,213 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:26:11,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:26:11,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:26:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:26:11,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:26:11,215 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-10-11 02:26:11,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:11,215 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:26:11,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:26:11,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:26:11,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-11 02:26:11,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:26:11,231 INFO L265 CegarLoopResult]: At program point L217(lines 7 221) the Hoare annotation is: true [2021-10-11 02:26:11,231 INFO L262 CegarLoopResult]: For program point L151-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,231 INFO L262 CegarLoopResult]: For program point L201-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,231 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:26:11,231 INFO L262 CegarLoopResult]: For program point L152(line 152) no Hoare annotation was computed. [2021-10-11 02:26:11,232 INFO L262 CegarLoopResult]: For program point L202(line 202) no Hoare annotation was computed. [2021-10-11 02:26:11,232 INFO L262 CegarLoopResult]: For program point L186-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,232 INFO L265 CegarLoopResult]: At program point L220(lines 6 221) the Hoare annotation is: true [2021-10-11 02:26:11,232 INFO L262 CegarLoopResult]: For program point L187(line 187) no Hoare annotation was computed. [2021-10-11 02:26:11,232 INFO L262 CegarLoopResult]: For program point L55(lines 55 57) no Hoare annotation was computed. [2021-10-11 02:26:11,232 INFO L262 CegarLoopResult]: For program point L171-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,232 INFO L262 CegarLoopResult]: For program point L172(line 172) no Hoare annotation was computed. [2021-10-11 02:26:11,233 INFO L262 CegarLoopResult]: For program point L156-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,233 INFO L262 CegarLoopResult]: For program point L206-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,233 INFO L262 CegarLoopResult]: For program point L140-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,233 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:26:11,233 INFO L262 CegarLoopResult]: For program point L157(line 157) no Hoare annotation was computed. [2021-10-11 02:26:11,233 INFO L262 CegarLoopResult]: For program point L207(line 207) no Hoare annotation was computed. [2021-10-11 02:26:11,233 INFO L262 CegarLoopResult]: For program point L191-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,234 INFO L262 CegarLoopResult]: For program point L192(line 192) no Hoare annotation was computed. [2021-10-11 02:26:11,234 INFO L262 CegarLoopResult]: For program point L176-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,234 INFO L262 CegarLoopResult]: For program point L177(line 177) no Hoare annotation was computed. [2021-10-11 02:26:11,234 INFO L262 CegarLoopResult]: For program point L161-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,234 INFO L265 CegarLoopResult]: At program point L211-1(lines 53 216) the Hoare annotation is: true [2021-10-11 02:26:11,234 INFO L262 CegarLoopResult]: For program point L162(line 162) no Hoare annotation was computed. [2021-10-11 02:26:11,234 INFO L262 CegarLoopResult]: For program point L212(line 212) no Hoare annotation was computed. [2021-10-11 02:26:11,235 INFO L258 CegarLoopResult]: At program point L212-1(lines 7 221) the Hoare annotation is: false [2021-10-11 02:26:11,235 INFO L262 CegarLoopResult]: For program point L146-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,235 INFO L262 CegarLoopResult]: For program point L196-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,235 INFO L262 CegarLoopResult]: For program point L147(line 147) no Hoare annotation was computed. [2021-10-11 02:26:11,235 INFO L262 CegarLoopResult]: For program point L197(line 197) no Hoare annotation was computed. [2021-10-11 02:26:11,235 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 219) no Hoare annotation was computed. [2021-10-11 02:26:11,236 INFO L262 CegarLoopResult]: For program point L181-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,236 INFO L262 CegarLoopResult]: For program point L182(line 182) no Hoare annotation was computed. [2021-10-11 02:26:11,236 INFO L262 CegarLoopResult]: For program point L166-1(lines 53 216) no Hoare annotation was computed. [2021-10-11 02:26:11,236 INFO L262 CegarLoopResult]: For program point L167(line 167) no Hoare annotation was computed. [2021-10-11 02:26:11,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:11 BoogieIcfgContainer [2021-10-11 02:26:11,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:11,246 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:11,246 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:11,246 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:11,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:09" (3/4) ... [2021-10-11 02:26:11,250 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:26:11,262 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-11 02:26:11,262 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:26:11,263 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:26:11,264 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:26:11,320 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58976aef-65c2-4330-b0d6-dd28b3f5c78a/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:11,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:11,322 INFO L168 Benchmark]: Toolchain (without parser) took 3270.00 ms. Allocated memory was 102.8 MB in the beginning and 127.9 MB in the end (delta: 25.2 MB). Free memory was 74.5 MB in the beginning and 62.0 MB in the end (delta: 12.4 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:11,322 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 102.8 MB. Free memory is still 57.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:11,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.65 ms. Allocated memory was 102.8 MB in the beginning and 127.9 MB in the end (delta: 25.2 MB). Free memory was 74.2 MB in the beginning and 103.4 MB in the end (delta: -29.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:11,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 127.9 MB. Free memory was 103.0 MB in the beginning and 101.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:11,324 INFO L168 Benchmark]: Boogie Preprocessor took 56.65 ms. Allocated memory is still 127.9 MB. Free memory was 101.3 MB in the beginning and 99.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:11,324 INFO L168 Benchmark]: RCFGBuilder took 907.98 ms. Allocated memory is still 127.9 MB. Free memory was 99.9 MB in the beginning and 96.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:11,324 INFO L168 Benchmark]: TraceAbstraction took 1897.11 ms. Allocated memory is still 127.9 MB. Free memory was 95.7 MB in the beginning and 66.2 MB in the end (delta: 29.5 MB). Peak memory consumption was 28.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:11,325 INFO L168 Benchmark]: Witness Printer took 74.67 ms. Allocated memory is still 127.9 MB. Free memory was 66.2 MB in the beginning and 62.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:11,327 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 102.8 MB. Free memory is still 57.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.65 ms. Allocated memory was 102.8 MB in the beginning and 127.9 MB in the end (delta: 25.2 MB). Free memory was 74.2 MB in the beginning and 103.4 MB in the end (delta: -29.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.80 ms. Allocated memory is still 127.9 MB. Free memory was 103.0 MB in the beginning and 101.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.65 ms. Allocated memory is still 127.9 MB. Free memory was 101.3 MB in the beginning and 99.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 907.98 ms. Allocated memory is still 127.9 MB. Free memory was 99.9 MB in the beginning and 96.3 MB in the end (delta: 3.6 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1897.11 ms. Allocated memory is still 127.9 MB. Free memory was 95.7 MB in the beginning and 66.2 MB in the end (delta: 29.5 MB). Peak memory consumption was 28.7 MB. Max. memory is 16.1 GB. * Witness Printer took 74.67 ms. Allocated memory is still 127.9 MB. Free memory was 66.2 MB in the beginning and 62.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 219]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 712 SDtfs, 604 SDslu, 1061 SDs, 0 SdLazy, 126 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 234 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 11011 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...