./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_13.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_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/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_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/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_d77ff87e-e53f-4124-8a82-516fc8d49d40/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 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:31:23,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:23,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:23,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:23,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:23,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:23,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:23,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:23,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:23,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:23,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:23,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:23,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:23,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:23,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:23,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:23,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:23,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:23,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:23,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:23,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:23,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:23,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:23,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:23,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:23,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:23,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:23,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:23,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:23,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:23,827 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:23,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:23,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:23,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:23,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:23,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:23,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:23,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:23,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:23,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:23,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:23,838 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:31:23,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:23,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:23,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:23,878 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:23,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:23,878 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:23,879 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:23,879 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:23,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:23,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:23,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:23,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:23,885 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:23,885 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:23,885 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:23,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:23,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:23,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:23,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:23,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:23,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:31:23,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:23,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:31:23,888 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:23,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:23,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:31:23,889 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:23,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:31:23,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:23,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:23,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:23,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:23,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:23,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:31:23,892 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:23,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:23,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:31:23,893 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:23,893 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:23,893 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_d77ff87e-e53f-4124-8a82-516fc8d49d40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 837e2aefd0844822f4a3cad7b5ee89b7191bc2c1 [2021-10-11 02:31:24,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:24,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:24,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:24,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:24,224 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:24,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/locks/test_locks_13.c [2021-10-11 02:31:24,316 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/data/285dff5b8/5b4fe167147b4035b2b017117c405e04/FLAG17ec861fd [2021-10-11 02:31:24,753 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:24,754 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/sv-benchmarks/c/locks/test_locks_13.c [2021-10-11 02:31:24,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/data/285dff5b8/5b4fe167147b4035b2b017117c405e04/FLAG17ec861fd [2021-10-11 02:31:25,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/data/285dff5b8/5b4fe167147b4035b2b017117c405e04 [2021-10-11 02:31:25,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:25,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:25,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:25,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:25,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:25,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@331c536b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25, skipping insertion in model container [2021-10-11 02:31:25,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:25,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:25,395 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_d77ff87e-e53f-4124-8a82-516fc8d49d40/sv-benchmarks/c/locks/test_locks_13.c[4936,4949] [2021-10-11 02:31:25,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:25,408 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:25,438 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_d77ff87e-e53f-4124-8a82-516fc8d49d40/sv-benchmarks/c/locks/test_locks_13.c[4936,4949] [2021-10-11 02:31:25,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:25,454 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:25,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25 WrapperNode [2021-10-11 02:31:25,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:25,456 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:25,456 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:25,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:25,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:25,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:25,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:25,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:25,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... [2021-10-11 02:31:25,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:25,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:25,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:25,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:25,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/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 02:31:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:25,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:25,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:25,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:26,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:26,430 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:31:26,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:26 BoogieIcfgContainer [2021-10-11 02:31:26,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:26,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:26,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:26,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:26,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:25" (1/3) ... [2021-10-11 02:31:26,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46651a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:26, skipping insertion in model container [2021-10-11 02:31:26,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:25" (2/3) ... [2021-10-11 02:31:26,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46651a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:26, skipping insertion in model container [2021-10-11 02:31:26,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:26" (3/3) ... [2021-10-11 02:31:26,454 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.c [2021-10-11 02:31:26,469 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:26,473 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:31:26,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:31:26,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:26,529 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:31:26,529 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:26,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:26,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:26,530 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:26,530 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:26,530 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-10-11 02:31:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:31:26,549 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:26,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:31:26,550 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash -583953647, now seen corresponding path program 1 times [2021-10-11 02:31:26,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:26,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809736770] [2021-10-11 02:31:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:26,843 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 02:31:26,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809736770] [2021-10-11 02:31:26,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:26,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:26,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324163398] [2021-10-11 02:31:26,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:26,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:26,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:26,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:26,870 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2021-10-11 02:31:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:26,935 INFO L93 Difference]: Finished difference Result 70 states and 121 transitions. [2021-10-11 02:31:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:26,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:31:26,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:26,948 INFO L225 Difference]: With dead ends: 70 [2021-10-11 02:31:26,949 INFO L226 Difference]: Without dead ends: 59 [2021-10-11 02:31:26,952 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 02:31:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-11 02:31:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-10-11 02:31:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 55 transitions. [2021-10-11 02:31:27,004 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 55 transitions. Word has length 6 [2021-10-11 02:31:27,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,004 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 55 transitions. [2021-10-11 02:31:27,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 55 transitions. [2021-10-11 02:31:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:31:27,005 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:27,007 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash -922481497, now seen corresponding path program 1 times [2021-10-11 02:31:27,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926147549] [2021-10-11 02:31:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,150 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 02:31:27,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926147549] [2021-10-11 02:31:27,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787876460] [2021-10-11 02:31:27,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,159 INFO L87 Difference]: Start difference. First operand 31 states and 55 transitions. Second operand 4 states. [2021-10-11 02:31:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,208 INFO L93 Difference]: Finished difference Result 59 states and 103 transitions. [2021-10-11 02:31:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:27,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:31:27,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,212 INFO L225 Difference]: With dead ends: 59 [2021-10-11 02:31:27,212 INFO L226 Difference]: Without dead ends: 57 [2021-10-11 02:31:27,213 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 02:31:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-11 02:31:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 31. [2021-10-11 02:31:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 54 transitions. [2021-10-11 02:31:27,225 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 54 transitions. Word has length 7 [2021-10-11 02:31:27,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,226 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 54 transitions. [2021-10-11 02:31:27,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 54 transitions. [2021-10-11 02:31:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:31:27,228 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:27,229 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1468057382, now seen corresponding path program 1 times [2021-10-11 02:31:27,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648650956] [2021-10-11 02:31:27,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,338 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 02:31:27,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648650956] [2021-10-11 02:31:27,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283389214] [2021-10-11 02:31:27,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,344 INFO L87 Difference]: Start difference. First operand 31 states and 54 transitions. Second operand 4 states. [2021-10-11 02:31:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,375 INFO L93 Difference]: Finished difference Result 57 states and 98 transitions. [2021-10-11 02:31:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:27,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:31:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,381 INFO L225 Difference]: With dead ends: 57 [2021-10-11 02:31:27,382 INFO L226 Difference]: Without dead ends: 55 [2021-10-11 02:31:27,382 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 02:31:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-11 02:31:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-10-11 02:31:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 53 transitions. [2021-10-11 02:31:27,396 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 53 transitions. Word has length 8 [2021-10-11 02:31:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,397 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 53 transitions. [2021-10-11 02:31:27,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 53 transitions. [2021-10-11 02:31:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:31:27,398 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:31:27,399 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1734648356, now seen corresponding path program 1 times [2021-10-11 02:31:27,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233305079] [2021-10-11 02:31:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,497 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 02:31:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233305079] [2021-10-11 02:31:27,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422498633] [2021-10-11 02:31:27,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,500 INFO L87 Difference]: Start difference. First operand 31 states and 53 transitions. Second operand 4 states. [2021-10-11 02:31:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,537 INFO L93 Difference]: Finished difference Result 55 states and 93 transitions. [2021-10-11 02:31:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:27,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:31:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,539 INFO L225 Difference]: With dead ends: 55 [2021-10-11 02:31:27,539 INFO L226 Difference]: Without dead ends: 53 [2021-10-11 02:31:27,539 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 02:31:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-11 02:31:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2021-10-11 02:31:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 52 transitions. [2021-10-11 02:31:27,549 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 52 transitions. Word has length 9 [2021-10-11 02:31:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,551 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 52 transitions. [2021-10-11 02:31:27,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 52 transitions. [2021-10-11 02:31:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:31:27,552 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:31:27,552 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2060689211, now seen corresponding path program 1 times [2021-10-11 02:31:27,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846267759] [2021-10-11 02:31:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,633 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 02:31:27,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846267759] [2021-10-11 02:31:27,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265692085] [2021-10-11 02:31:27,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,641 INFO L87 Difference]: Start difference. First operand 31 states and 52 transitions. Second operand 4 states. [2021-10-11 02:31:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,672 INFO L93 Difference]: Finished difference Result 53 states and 88 transitions. [2021-10-11 02:31:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:27,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 02:31:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,674 INFO L225 Difference]: With dead ends: 53 [2021-10-11 02:31:27,674 INFO L226 Difference]: Without dead ends: 51 [2021-10-11 02:31:27,674 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 02:31:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-11 02:31:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2021-10-11 02:31:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 51 transitions. [2021-10-11 02:31:27,678 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 51 transitions. Word has length 10 [2021-10-11 02:31:27,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,679 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 51 transitions. [2021-10-11 02:31:27,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 51 transitions. [2021-10-11 02:31:27,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:31:27,679 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:31:27,680 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash -542930159, now seen corresponding path program 1 times [2021-10-11 02:31:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665496258] [2021-10-11 02:31:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,726 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 02:31:27,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665496258] [2021-10-11 02:31:27,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485653904] [2021-10-11 02:31:27,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,729 INFO L87 Difference]: Start difference. First operand 31 states and 51 transitions. Second operand 4 states. [2021-10-11 02:31:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,747 INFO L93 Difference]: Finished difference Result 51 states and 83 transitions. [2021-10-11 02:31:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:27,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:31:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,749 INFO L225 Difference]: With dead ends: 51 [2021-10-11 02:31:27,749 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 02:31:27,749 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 02:31:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 02:31:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2021-10-11 02:31:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 50 transitions. [2021-10-11 02:31:27,753 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 50 transitions. Word has length 11 [2021-10-11 02:31:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,753 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 50 transitions. [2021-10-11 02:31:27,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 50 transitions. [2021-10-11 02:31:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:31:27,754 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:31:27,754 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash 349248336, now seen corresponding path program 1 times [2021-10-11 02:31:27,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496744129] [2021-10-11 02:31:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,792 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 02:31:27,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496744129] [2021-10-11 02:31:27,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404399096] [2021-10-11 02:31:27,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,794 INFO L87 Difference]: Start difference. First operand 31 states and 50 transitions. Second operand 4 states. [2021-10-11 02:31:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,812 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2021-10-11 02:31:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:27,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:31:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,813 INFO L225 Difference]: With dead ends: 49 [2021-10-11 02:31:27,813 INFO L226 Difference]: Without dead ends: 47 [2021-10-11 02:31:27,813 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 02:31:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-11 02:31:27,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2021-10-11 02:31:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 49 transitions. [2021-10-11 02:31:27,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 49 transitions. Word has length 12 [2021-10-11 02:31:27,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,817 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 49 transitions. [2021-10-11 02:31:27,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 49 transitions. [2021-10-11 02:31:27,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:31:27,819 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:31:27,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2057989050, now seen corresponding path program 1 times [2021-10-11 02:31:27,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805316943] [2021-10-11 02:31:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,875 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 02:31:27,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805316943] [2021-10-11 02:31:27,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957477572] [2021-10-11 02:31:27,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,878 INFO L87 Difference]: Start difference. First operand 31 states and 49 transitions. Second operand 4 states. [2021-10-11 02:31:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:27,900 INFO L93 Difference]: Finished difference Result 47 states and 73 transitions. [2021-10-11 02:31:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:27,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 02:31:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:27,903 INFO L225 Difference]: With dead ends: 47 [2021-10-11 02:31:27,903 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:31:27,903 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 02:31:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:31:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2021-10-11 02:31:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 48 transitions. [2021-10-11 02:31:27,914 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 48 transitions. Word has length 13 [2021-10-11 02:31:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:27,915 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 48 transitions. [2021-10-11 02:31:27,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 48 transitions. [2021-10-11 02:31:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:31:27,916 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:31:27,917 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,918 INFO L82 PathProgramCache]: Analyzing trace with hash 627063653, now seen corresponding path program 1 times [2021-10-11 02:31:27,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813861847] [2021-10-11 02:31:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:27,984 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 02:31:27,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813861847] [2021-10-11 02:31:27,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:27,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:27,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396073467] [2021-10-11 02:31:27,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:27,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:27,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:27,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:27,987 INFO L87 Difference]: Start difference. First operand 31 states and 48 transitions. Second operand 4 states. [2021-10-11 02:31:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:28,015 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2021-10-11 02:31:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:28,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-10-11 02:31:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:28,016 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:31:28,016 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:31:28,017 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 02:31:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:31:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2021-10-11 02:31:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:28,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 47 transitions. [2021-10-11 02:31:28,023 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 47 transitions. Word has length 14 [2021-10-11 02:31:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:28,023 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 47 transitions. [2021-10-11 02:31:28,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 47 transitions. [2021-10-11 02:31:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 02:31:28,024 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:28,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:28,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:31:28,024 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2035648133, now seen corresponding path program 1 times [2021-10-11 02:31:28,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:28,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342024083] [2021-10-11 02:31:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,054 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 02:31:28,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342024083] [2021-10-11 02:31:28,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:28,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:28,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112476534] [2021-10-11 02:31:28,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:28,057 INFO L87 Difference]: Start difference. First operand 31 states and 47 transitions. Second operand 4 states. [2021-10-11 02:31:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:28,073 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2021-10-11 02:31:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:28,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-10-11 02:31:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:28,084 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:31:28,084 INFO L226 Difference]: Without dead ends: 41 [2021-10-11 02:31:28,084 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 02:31:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-11 02:31:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2021-10-11 02:31:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 46 transitions. [2021-10-11 02:31:28,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 46 transitions. Word has length 15 [2021-10-11 02:31:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:28,087 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 46 transitions. [2021-10-11 02:31:28,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 46 transitions. [2021-10-11 02:31:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-11 02:31:28,088 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:28,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:28,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-11 02:31:28,088 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1319632762, now seen corresponding path program 1 times [2021-10-11 02:31:28,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:28,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858546555] [2021-10-11 02:31:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,119 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 02:31:28,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858546555] [2021-10-11 02:31:28,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:28,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:28,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860145578] [2021-10-11 02:31:28,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:28,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:28,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:28,121 INFO L87 Difference]: Start difference. First operand 31 states and 46 transitions. Second operand 4 states. [2021-10-11 02:31:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:28,137 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2021-10-11 02:31:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:28,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2021-10-11 02:31:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:28,138 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:31:28,138 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:31:28,139 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 02:31:28,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:31:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-10-11 02:31:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2021-10-11 02:31:28,141 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 16 [2021-10-11 02:31:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:28,141 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2021-10-11 02:31:28,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2021-10-11 02:31:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:31:28,142 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:28,142 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 02:31:28,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:31:28,143 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:28,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:28,143 INFO L82 PathProgramCache]: Analyzing trace with hash -2040841552, now seen corresponding path program 1 times [2021-10-11 02:31:28,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:28,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026318826] [2021-10-11 02:31:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,193 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 02:31:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026318826] [2021-10-11 02:31:28,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:28,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:28,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383066525] [2021-10-11 02:31:28,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:28,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:28,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:28,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:28,195 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 4 states. [2021-10-11 02:31:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:28,212 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2021-10-11 02:31:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:28,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-10-11 02:31:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:28,213 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:31:28,213 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:31:28,214 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 02:31:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:31:28,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-10-11 02:31:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:31:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2021-10-11 02:31:28,218 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 17 [2021-10-11 02:31:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:28,220 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2021-10-11 02:31:28,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2021-10-11 02:31:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:31:28,223 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:28,224 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 02:31:28,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-11 02:31:28,224 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1158637455, now seen corresponding path program 1 times [2021-10-11 02:31:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:28,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847328482] [2021-10-11 02:31:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,272 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 02:31:28,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847328482] [2021-10-11 02:31:28,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:28,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:28,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595606301] [2021-10-11 02:31:28,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:28,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:28,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:28,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:28,275 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand 4 states. [2021-10-11 02:31:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:28,299 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2021-10-11 02:31:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:28,300 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 02:31:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:28,302 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:31:28,302 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:31:28,303 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 02:31:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:31:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:31:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:31:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:31:28,304 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-11 02:31:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:28,305 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:31:28,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:31:28,305 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:31:28,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-11 02:31:28,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:31:28,323 INFO L262 CegarLoopResult]: For program point L52(lines 52 54) no Hoare annotation was computed. [2021-10-11 02:31:28,323 INFO L262 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2021-10-11 02:31:28,323 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L152-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L265 CegarLoopResult]: At program point L203(lines 7 207) the Hoare annotation is: true [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L137-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L187-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L188(line 188) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L172-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L265 CegarLoopResult]: At program point L206(lines 6 207) the Hoare annotation is: true [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point L173(line 173) no Hoare annotation was computed. [2021-10-11 02:31:28,324 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L157-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L142-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L192-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L193(line 193) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L177-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,325 INFO L262 CegarLoopResult]: For program point L178(line 178) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point L162-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point L147-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L265 CegarLoopResult]: At program point L197-1(lines 50 202) the Hoare annotation is: true [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point L131-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 205) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point L198(line 198) no Hoare annotation was computed. [2021-10-11 02:31:28,326 INFO L258 CegarLoopResult]: At program point L198-1(lines 7 207) the Hoare annotation is: false [2021-10-11 02:31:28,326 INFO L262 CegarLoopResult]: For program point L182-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,327 INFO L262 CegarLoopResult]: For program point L183(line 183) no Hoare annotation was computed. [2021-10-11 02:31:28,327 INFO L262 CegarLoopResult]: For program point L167-1(lines 50 202) no Hoare annotation was computed. [2021-10-11 02:31:28,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:28 BoogieIcfgContainer [2021-10-11 02:31:28,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:28,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:28,336 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:28,336 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:28,337 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:26" (3/4) ... [2021-10-11 02:31:28,339 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:31:28,351 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-11 02:31:28,351 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:31:28,352 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:31:28,352 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:31:28,420 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77ff87e-e53f-4124-8a82-516fc8d49d40/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:28,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:28,422 INFO L168 Benchmark]: Toolchain (without parser) took 3285.07 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 55.0 MB in the beginning and 49.6 MB in the end (delta: 5.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,422 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory was 59.4 MB in the beginning and 59.4 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:28,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.28 ms. Allocated memory is still 88.1 MB. Free memory was 54.8 MB in the beginning and 65.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.35 ms. Allocated memory is still 88.1 MB. Free memory was 65.0 MB in the beginning and 63.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:28,423 INFO L168 Benchmark]: Boogie Preprocessor took 36.58 ms. Allocated memory is still 88.1 MB. Free memory was 63.3 MB in the beginning and 61.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,424 INFO L168 Benchmark]: RCFGBuilder took 862.22 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 61.7 MB in the beginning and 67.8 MB in the end (delta: -6.0 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,424 INFO L168 Benchmark]: TraceAbstraction took 1900.79 ms. Allocated memory is still 107.0 MB. Free memory was 67.4 MB in the beginning and 53.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,425 INFO L168 Benchmark]: Witness Printer took 84.37 ms. Allocated memory is still 107.0 MB. Free memory was 53.8 MB in the beginning and 49.6 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:28,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory was 59.4 MB in the beginning and 59.4 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.28 ms. Allocated memory is still 88.1 MB. Free memory was 54.8 MB in the beginning and 65.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.35 ms. Allocated memory is still 88.1 MB. Free memory was 65.0 MB in the beginning and 63.3 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.58 ms. Allocated memory is still 88.1 MB. Free memory was 63.3 MB in the beginning and 61.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 862.22 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 61.7 MB in the beginning and 67.8 MB in the end (delta: -6.0 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1900.79 ms. Allocated memory is still 107.0 MB. Free memory was 67.4 MB in the beginning and 53.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * Witness Printer took 84.37 ms. Allocated memory is still 107.0 MB. Free memory was 53.8 MB in the beginning and 49.6 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: 205]: 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: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 13, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 616 SDtfs, 522 SDslu, 914 SDs, 0 SdLazy, 117 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 13 MinimizatonAttempts, 204 StatesRemovedByMinimization, 12 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, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 143 ConstructedInterpolants, 0 QuantifiedInterpolants, 9139 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 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...