./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_9.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_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/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_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/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_881a31e8-864a-4cc4-abfc-6c5c82d39886/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 20a70402cc893fb2c7adec21ca8a267adc3c5cbb ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:31:33,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:33,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:33,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:33,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:33,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:33,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:33,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:33,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:33,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:33,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:33,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:33,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:33,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:33,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:33,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:33,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:33,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:33,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:33,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:33,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:33,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:33,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:33,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:33,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:33,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:33,626 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:33,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:33,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:33,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:33,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:33,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:33,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:33,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:33,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:33,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:33,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:33,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:33,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:33,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:33,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:33,640 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:31:33,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:33,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:33,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:33,691 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:33,692 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:33,692 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:33,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:33,692 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:33,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:33,693 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:33,700 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:33,700 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:33,700 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:33,701 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:33,701 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:33,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:33,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:33,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:33,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:33,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:33,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:31:33,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:33,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:31:33,703 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:33,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:33,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:31:33,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:33,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:31:33,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:33,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:33,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:33,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:33,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:33,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:31:33,706 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:33,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:33,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:31:33,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:33,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:33,707 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_881a31e8-864a-4cc4-abfc-6c5c82d39886/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20a70402cc893fb2c7adec21ca8a267adc3c5cbb [2021-10-11 02:31:34,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:34,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:34,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:34,095 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:34,097 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:34,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/locks/test_locks_9.c [2021-10-11 02:31:34,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/data/78373ee8e/b28b8c2e98ba4083b6d3b01e96690554/FLAG2f41ae4f6 [2021-10-11 02:31:34,642 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:34,642 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/sv-benchmarks/c/locks/test_locks_9.c [2021-10-11 02:31:34,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/data/78373ee8e/b28b8c2e98ba4083b6d3b01e96690554/FLAG2f41ae4f6 [2021-10-11 02:31:35,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/data/78373ee8e/b28b8c2e98ba4083b6d3b01e96690554 [2021-10-11 02:31:35,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:35,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:35,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:35,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:35,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:35,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfb4130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35, skipping insertion in model container [2021-10-11 02:31:35,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:35,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:35,231 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_881a31e8-864a-4cc4-abfc-6c5c82d39886/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-11 02:31:35,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:35,243 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:35,268 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_881a31e8-864a-4cc4-abfc-6c5c82d39886/sv-benchmarks/c/locks/test_locks_9.c[3555,3568] [2021-10-11 02:31:35,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:35,283 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:35,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35 WrapperNode [2021-10-11 02:31:35,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:35,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:35,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:35,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:35,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:35,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:35,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:35,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:35,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... [2021-10-11 02:31:35,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:35,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:35,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:35,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:35,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/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 02:31:35,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:35,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:35,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:35,967 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:31:35,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:35 BoogieIcfgContainer [2021-10-11 02:31:35,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:35,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:35,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:35,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:35,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:35" (1/3) ... [2021-10-11 02:31:35,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26afcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:35, skipping insertion in model container [2021-10-11 02:31:35,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:35" (2/3) ... [2021-10-11 02:31:35,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26afcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:35, skipping insertion in model container [2021-10-11 02:31:35,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:35" (3/3) ... [2021-10-11 02:31:35,990 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-10-11 02:31:36,014 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:36,018 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:31:36,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:31:36,065 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:36,066 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:31:36,066 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:36,066 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:36,066 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:36,067 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:36,067 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:36,067 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-10-11 02:31:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:31:36,099 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:36,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:31:36,101 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1761973180, now seen corresponding path program 1 times [2021-10-11 02:31:36,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:36,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548897953] [2021-10-11 02:31:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:36,386 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 02:31:36,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548897953] [2021-10-11 02:31:36,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:36,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:36,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776619479] [2021-10-11 02:31:36,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:36,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:36,411 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2021-10-11 02:31:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:36,500 INFO L93 Difference]: Finished difference Result 54 states and 89 transitions. [2021-10-11 02:31:36,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:36,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:31:36,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:36,514 INFO L225 Difference]: With dead ends: 54 [2021-10-11 02:31:36,514 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 02:31:36,521 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 02:31:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 02:31:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2021-10-11 02:31:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 39 transitions. [2021-10-11 02:31:36,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 39 transitions. Word has length 6 [2021-10-11 02:31:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:36,566 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 39 transitions. [2021-10-11 02:31:36,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 39 transitions. [2021-10-11 02:31:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:31:36,567 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:36,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:36,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:36,568 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:36,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:36,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1213192596, now seen corresponding path program 1 times [2021-10-11 02:31:36,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:36,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767428724] [2021-10-11 02:31:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:36,676 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 02:31:36,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767428724] [2021-10-11 02:31:36,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:36,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:36,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872365670] [2021-10-11 02:31:36,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:36,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:36,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:36,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:36,680 INFO L87 Difference]: Start difference. First operand 23 states and 39 transitions. Second operand 4 states. [2021-10-11 02:31:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:36,713 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2021-10-11 02:31:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:36,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:31:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:36,717 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:31:36,718 INFO L226 Difference]: Without dead ends: 41 [2021-10-11 02:31:36,719 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 02:31:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-11 02:31:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2021-10-11 02:31:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 38 transitions. [2021-10-11 02:31:36,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 38 transitions. Word has length 7 [2021-10-11 02:31:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:36,733 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 38 transitions. [2021-10-11 02:31:36,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 38 transitions. [2021-10-11 02:31:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:31:36,735 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:36,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:36,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:36,735 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1045949201, now seen corresponding path program 1 times [2021-10-11 02:31:36,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:36,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792921770] [2021-10-11 02:31:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:36,843 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 02:31:36,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792921770] [2021-10-11 02:31:36,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:36,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:36,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048139724] [2021-10-11 02:31:36,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:36,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:36,849 INFO L87 Difference]: Start difference. First operand 23 states and 38 transitions. Second operand 4 states. [2021-10-11 02:31:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:36,884 INFO L93 Difference]: Finished difference Result 41 states and 66 transitions. [2021-10-11 02:31:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:36,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 02:31:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:36,887 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:31:36,887 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:31:36,888 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 02:31:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:31:36,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2021-10-11 02:31:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 37 transitions. [2021-10-11 02:31:36,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 37 transitions. Word has length 8 [2021-10-11 02:31:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:36,897 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 37 transitions. [2021-10-11 02:31:36,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 37 transitions. [2021-10-11 02:31:36,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:31:36,898 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:36,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:36,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:31:36,899 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:36,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1935098783, now seen corresponding path program 1 times [2021-10-11 02:31:36,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:36,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188571122] [2021-10-11 02:31:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:36,976 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 02:31:36,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188571122] [2021-10-11 02:31:36,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:36,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:36,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676243555] [2021-10-11 02:31:36,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:36,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:36,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:36,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:36,978 INFO L87 Difference]: Start difference. First operand 23 states and 37 transitions. Second operand 4 states. [2021-10-11 02:31:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:36,996 INFO L93 Difference]: Finished difference Result 39 states and 61 transitions. [2021-10-11 02:31:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:36,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:31:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:36,998 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:31:36,998 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:31:36,998 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 02:31:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:31:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2021-10-11 02:31:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:37,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 36 transitions. [2021-10-11 02:31:37,002 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 36 transitions. Word has length 9 [2021-10-11 02:31:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:37,003 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 36 transitions. [2021-10-11 02:31:37,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 36 transitions. [2021-10-11 02:31:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:31:37,003 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:37,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:37,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:31:37,004 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash 141694566, now seen corresponding path program 1 times [2021-10-11 02:31:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:37,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008135961] [2021-10-11 02:31:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:37,075 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 02:31:37,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008135961] [2021-10-11 02:31:37,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:37,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:37,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977644087] [2021-10-11 02:31:37,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:37,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:37,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:37,077 INFO L87 Difference]: Start difference. First operand 23 states and 36 transitions. Second operand 4 states. [2021-10-11 02:31:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:37,102 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2021-10-11 02:31:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:37,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 02:31:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:37,104 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:31:37,104 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:31:37,105 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 02:31:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:31:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2021-10-11 02:31:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2021-10-11 02:31:37,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 35 transitions. Word has length 10 [2021-10-11 02:31:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:37,116 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 35 transitions. [2021-10-11 02:31:37,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 35 transitions. [2021-10-11 02:31:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:31:37,117 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:37,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:37,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:31:37,119 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash 97779286, now seen corresponding path program 1 times [2021-10-11 02:31:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:37,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834641071] [2021-10-11 02:31:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:37,189 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 02:31:37,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834641071] [2021-10-11 02:31:37,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:37,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:37,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535870782] [2021-10-11 02:31:37,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:37,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:37,194 INFO L87 Difference]: Start difference. First operand 23 states and 35 transitions. Second operand 4 states. [2021-10-11 02:31:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:37,227 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2021-10-11 02:31:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:37,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-10-11 02:31:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:37,229 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:31:37,229 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 02:31:37,229 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 02:31:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 02:31:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-10-11 02:31:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2021-10-11 02:31:37,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 11 [2021-10-11 02:31:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:37,237 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2021-10-11 02:31:37,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2021-10-11 02:31:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:31:37,238 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:37,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:37,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:31:37,238 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1263594053, now seen corresponding path program 1 times [2021-10-11 02:31:37,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:37,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913047366] [2021-10-11 02:31:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:37,284 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 02:31:37,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913047366] [2021-10-11 02:31:37,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:37,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:37,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220083426] [2021-10-11 02:31:37,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:37,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:37,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:37,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:37,286 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand 4 states. [2021-10-11 02:31:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:37,301 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2021-10-11 02:31:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:37,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-10-11 02:31:37,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:37,302 INFO L225 Difference]: With dead ends: 33 [2021-10-11 02:31:37,302 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:31:37,303 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 02:31:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:31:37,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-11 02:31:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2021-10-11 02:31:37,306 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 12 [2021-10-11 02:31:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:37,306 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2021-10-11 02:31:37,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2021-10-11 02:31:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:31:37,307 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:37,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:37,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:31:37,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:37,308 INFO L82 PathProgramCache]: Analyzing trace with hash -516494261, now seen corresponding path program 1 times [2021-10-11 02:31:37,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:37,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17482079] [2021-10-11 02:31:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:37,339 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 02:31:37,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17482079] [2021-10-11 02:31:37,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:37,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:37,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162789578] [2021-10-11 02:31:37,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:37,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:37,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:37,342 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 4 states. [2021-10-11 02:31:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:37,356 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2021-10-11 02:31:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:37,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-10-11 02:31:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:37,358 INFO L225 Difference]: With dead ends: 31 [2021-10-11 02:31:37,358 INFO L226 Difference]: Without dead ends: 29 [2021-10-11 02:31:37,358 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 02:31:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-11 02:31:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2021-10-11 02:31:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:31:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2021-10-11 02:31:37,367 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2021-10-11 02:31:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:37,367 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2021-10-11 02:31:37,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2021-10-11 02:31:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:31:37,369 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:37,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:37,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:31:37,369 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1168763152, now seen corresponding path program 1 times [2021-10-11 02:31:37,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:37,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952285050] [2021-10-11 02:31:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:37,425 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 02:31:37,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952285050] [2021-10-11 02:31:37,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:37,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:37,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137541662] [2021-10-11 02:31:37,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:37,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:37,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:37,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:37,427 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand 4 states. [2021-10-11 02:31:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:37,457 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2021-10-11 02:31:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:37,457 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-10-11 02:31:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:37,458 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:31:37,458 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:31:37,458 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 02:31:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:31:37,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:31:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:31:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:31:37,458 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-11 02:31:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:37,459 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:31:37,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:31:37,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:31:37,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:31:37,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:31:37,471 INFO L262 CegarLoopResult]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,471 INFO L262 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2021-10-11 02:31:37,471 INFO L262 CegarLoopResult]: For program point L127(line 127) no Hoare annotation was computed. [2021-10-11 02:31:37,471 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L262 CegarLoopResult]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L262 CegarLoopResult]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L262 CegarLoopResult]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L262 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L262 CegarLoopResult]: For program point L137(line 137) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L262 CegarLoopResult]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L262 CegarLoopResult]: For program point L122(line 122) no Hoare annotation was computed. [2021-10-11 02:31:37,472 INFO L265 CegarLoopResult]: At program point L147(lines 7 151) the Hoare annotation is: true [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 149) no Hoare annotation was computed. [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point L132(line 132) no Hoare annotation was computed. [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:31:37,473 INFO L262 CegarLoopResult]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,474 INFO L265 CegarLoopResult]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2021-10-11 02:31:37,474 INFO L265 CegarLoopResult]: At program point L150(lines 6 151) the Hoare annotation is: true [2021-10-11 02:31:37,474 INFO L262 CegarLoopResult]: For program point L117(line 117) no Hoare annotation was computed. [2021-10-11 02:31:37,474 INFO L262 CegarLoopResult]: For program point L142(line 142) no Hoare annotation was computed. [2021-10-11 02:31:37,474 INFO L258 CegarLoopResult]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2021-10-11 02:31:37,474 INFO L262 CegarLoopResult]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2021-10-11 02:31:37,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:37 BoogieIcfgContainer [2021-10-11 02:31:37,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:37,484 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:37,484 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:37,485 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:37,485 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:35" (3/4) ... [2021-10-11 02:31:37,488 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:31:37,499 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-11 02:31:37,499 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:31:37,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-11 02:31:37,500 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:31:37,564 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_881a31e8-864a-4cc4-abfc-6c5c82d39886/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:37,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:37,566 INFO L168 Benchmark]: Toolchain (without parser) took 2555.66 ms. Allocated memory was 121.6 MB in the beginning and 165.7 MB in the end (delta: 44.0 MB). Free memory was 80.3 MB in the beginning and 63.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 60.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:37,567 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 121.6 MB. Free memory was 96.5 MB in the beginning and 96.4 MB in the end (delta: 64.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:37,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.78 ms. Allocated memory is still 121.6 MB. Free memory was 80.1 MB in the beginning and 95.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:37,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 121.6 MB. Free memory was 95.1 MB in the beginning and 93.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:37,568 INFO L168 Benchmark]: Boogie Preprocessor took 26.61 ms. Allocated memory is still 121.6 MB. Free memory was 93.4 MB in the beginning and 92.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:37,569 INFO L168 Benchmark]: RCFGBuilder took 620.35 ms. Allocated memory is still 121.6 MB. Free memory was 92.3 MB in the beginning and 58.0 MB in the end (delta: 34.3 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:37,569 INFO L168 Benchmark]: TraceAbstraction took 1513.29 ms. Allocated memory was 121.6 MB in the beginning and 165.7 MB in the end (delta: 44.0 MB). Free memory was 57.3 MB in the beginning and 67.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:37,570 INFO L168 Benchmark]: Witness Printer took 80.28 ms. Allocated memory is still 165.7 MB. Free memory was 67.3 MB in the beginning and 63.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:37,573 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 121.6 MB. Free memory was 96.5 MB in the beginning and 96.4 MB in the end (delta: 64.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.78 ms. Allocated memory is still 121.6 MB. Free memory was 80.1 MB in the beginning and 95.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 121.6 MB. Free memory was 95.1 MB in the beginning and 93.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.61 ms. Allocated memory is still 121.6 MB. Free memory was 93.4 MB in the beginning and 92.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 620.35 ms. Allocated memory is still 121.6 MB. Free memory was 92.3 MB in the beginning and 58.0 MB in the end (delta: 34.3 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1513.29 ms. Allocated memory was 121.6 MB in the beginning and 165.7 MB in the end (delta: 44.0 MB). Free memory was 57.3 MB in the beginning and 67.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. * Witness Printer took 80.28 ms. Allocated memory is still 165.7 MB. Free memory was 67.3 MB in the beginning and 63.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 149]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 254 SDslu, 440 SDs, 0 SdLazy, 83 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 104 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 3741 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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...