./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_14-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/locks/test_locks_14-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e59705ae4b9d6434bb0d27311e7a023ef1b3945 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:13:47,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:13:47,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:13:47,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:13:47,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:13:47,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:13:47,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:13:47,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:13:47,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:13:47,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:13:47,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:13:47,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:13:47,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:13:47,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:13:47,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:13:47,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:13:47,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:13:47,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:13:47,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:13:47,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:13:47,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:13:47,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:13:47,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:13:47,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:13:47,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:13:47,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:13:47,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:13:47,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:13:47,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:13:47,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:13:47,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:13:47,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:13:47,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:13:47,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:13:47,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:13:47,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:13:47,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:13:47,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:13:47,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:13:47,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:13:47,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:13:47,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:13:47,628 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:13:47,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:13:47,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:13:47,631 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:13:47,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:13:47,631 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:13:47,632 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:13:47,632 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:13:47,632 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:13:47,632 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:13:47,640 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:13:47,640 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:13:47,640 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:13:47,640 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:13:47,641 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:13:47,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:13:47,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:13:47,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:13:47,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:13:47,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:13:47,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:13:47,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:13:47,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:13:47,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:13:47,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:13:47,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:13:47,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:13:47,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:13:47,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:13:47,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:13:47,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:13:47,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:13:47,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:13:47,648 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:13:47,648 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:13:47,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:13:47,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:13:47,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:13:47,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:13:47,649 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_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e59705ae4b9d6434bb0d27311e7a023ef1b3945 [2021-10-16 02:13:48,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:13:48,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:13:48,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:13:48,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:13:48,045 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:13:48,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/locks/test_locks_14-1.c [2021-10-16 02:13:48,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/data/d8af746cd/de63d44319484592bc122f4d6ae2e89a/FLAG7f9e0aeb9 [2021-10-16 02:13:48,817 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:13:48,817 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/sv-benchmarks/c/locks/test_locks_14-1.c [2021-10-16 02:13:48,826 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/data/d8af746cd/de63d44319484592bc122f4d6ae2e89a/FLAG7f9e0aeb9 [2021-10-16 02:13:49,176 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/data/d8af746cd/de63d44319484592bc122f4d6ae2e89a [2021-10-16 02:13:49,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:13:49,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:13:49,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:13:49,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:13:49,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:13:49,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0afde0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49, skipping insertion in model container [2021-10-16 02:13:49,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:13:49,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:13:49,499 WARN L228 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_42763c2d-5565-4379-a975-94b03a1df399/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2021-10-16 02:13:49,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:13:49,538 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:13:49,577 WARN L228 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_42763c2d-5565-4379-a975-94b03a1df399/sv-benchmarks/c/locks/test_locks_14-1.c[5283,5296] [2021-10-16 02:13:49,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:13:49,596 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:13:49,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49 WrapperNode [2021-10-16 02:13:49,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:13:49,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:13:49,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:13:49,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:13:49,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:13:49,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:13:49,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:13:49,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:13:49,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:13:49,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:13:49,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:13:49,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:13:49,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (1/1) ... [2021-10-16 02:13:49,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:13:49,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:13:49,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:13:49,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:13:49,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:13:49,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:13:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:13:49,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:13:50,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:13:50,659 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-16 02:13:50,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:13:50 BoogieIcfgContainer [2021-10-16 02:13:50,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:13:50,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:13:50,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:13:50,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:13:50,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:13:49" (1/3) ... [2021-10-16 02:13:50,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685717dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:13:50, skipping insertion in model container [2021-10-16 02:13:50,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:13:49" (2/3) ... [2021-10-16 02:13:50,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@685717dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:13:50, skipping insertion in model container [2021-10-16 02:13:50,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:13:50" (3/3) ... [2021-10-16 02:13:50,670 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.c [2021-10-16 02:13:50,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:13:50,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:13:50,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:13:50,733 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:13:50,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:13:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 34 states have (on average 1.911764705882353) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:13:50,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:50,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:13:50,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:50,766 INFO L82 PathProgramCache]: Analyzing trace with hash -96656291, now seen corresponding path program 1 times [2021-10-16 02:13:50,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:50,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884791546] [2021-10-16 02:13:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:50,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:51,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:51,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884791546] [2021-10-16 02:13:51,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884791546] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:51,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:51,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:51,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101937024] [2021-10-16 02:13:51,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:51,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:51,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:51,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,088 INFO L87 Difference]: Start difference. First operand has 36 states, 34 states have (on average 1.911764705882353) internal successors, (65), 35 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:51,149 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-10-16 02:13:51,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:51,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:13:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:51,164 INFO L225 Difference]: With dead ends: 74 [2021-10-16 02:13:51,164 INFO L226 Difference]: Without dead ends: 63 [2021-10-16 02:13:51,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-16 02:13:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 33. [2021-10-16 02:13:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 59 transitions. [2021-10-16 02:13:51,229 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 59 transitions. Word has length 6 [2021-10-16 02:13:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:51,230 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 59 transitions. [2021-10-16 02:13:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 59 transitions. [2021-10-16 02:13:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:13:51,231 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:51,232 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:51,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:13:51,232 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:51,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1298834327, now seen corresponding path program 1 times [2021-10-16 02:13:51,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:51,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495169902] [2021-10-16 02:13:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:51,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:51,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:51,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:51,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495169902] [2021-10-16 02:13:51,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495169902] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:51,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:51,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:51,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212325521] [2021-10-16 02:13:51,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,417 INFO L87 Difference]: Start difference. First operand 33 states and 59 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:51,477 INFO L93 Difference]: Finished difference Result 63 states and 111 transitions. [2021-10-16 02:13:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:51,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:13:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:51,481 INFO L225 Difference]: With dead ends: 63 [2021-10-16 02:13:51,481 INFO L226 Difference]: Without dead ends: 61 [2021-10-16 02:13:51,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-16 02:13:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 33. [2021-10-16 02:13:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 58 transitions. [2021-10-16 02:13:51,504 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 58 transitions. Word has length 7 [2021-10-16 02:13:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:51,505 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 58 transitions. [2021-10-16 02:13:51,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 58 transitions. [2021-10-16 02:13:51,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:13:51,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:51,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:51,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:13:51,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1609370866, now seen corresponding path program 1 times [2021-10-16 02:13:51,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:51,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59421557] [2021-10-16 02:13:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:51,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:51,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:51,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59421557] [2021-10-16 02:13:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59421557] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:51,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:51,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:51,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918782945] [2021-10-16 02:13:51,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:51,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,641 INFO L87 Difference]: Start difference. First operand 33 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:51,674 INFO L93 Difference]: Finished difference Result 61 states and 106 transitions. [2021-10-16 02:13:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:13:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:51,678 INFO L225 Difference]: With dead ends: 61 [2021-10-16 02:13:51,678 INFO L226 Difference]: Without dead ends: 59 [2021-10-16 02:13:51,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-16 02:13:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 33. [2021-10-16 02:13:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 57 transitions. [2021-10-16 02:13:51,687 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 57 transitions. Word has length 8 [2021-10-16 02:13:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:51,687 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 57 transitions. [2021-10-16 02:13:51,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 57 transitions. [2021-10-16 02:13:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:13:51,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:51,689 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:51,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:13:51,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:51,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:51,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1648897972, now seen corresponding path program 1 times [2021-10-16 02:13:51,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:51,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895246638] [2021-10-16 02:13:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:51,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:51,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:51,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895246638] [2021-10-16 02:13:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895246638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:51,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:51,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:51,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673919318] [2021-10-16 02:13:51,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:51,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,770 INFO L87 Difference]: Start difference. First operand 33 states and 57 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:51,796 INFO L93 Difference]: Finished difference Result 59 states and 101 transitions. [2021-10-16 02:13:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 02:13:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:51,798 INFO L225 Difference]: With dead ends: 59 [2021-10-16 02:13:51,798 INFO L226 Difference]: Without dead ends: 57 [2021-10-16 02:13:51,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-16 02:13:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-10-16 02:13:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-10-16 02:13:51,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 9 [2021-10-16 02:13:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:51,807 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-10-16 02:13:51,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-10-16 02:13:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:13:51,808 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:51,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:51,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:13:51,809 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash 423983495, now seen corresponding path program 1 times [2021-10-16 02:13:51,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:51,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218758894] [2021-10-16 02:13:51,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:51,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:51,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:51,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218758894] [2021-10-16 02:13:51,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218758894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:51,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:51,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:51,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266317583] [2021-10-16 02:13:51,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:51,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:51,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:51,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,899 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:51,942 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2021-10-16 02:13:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:51,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:13:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:51,946 INFO L225 Difference]: With dead ends: 57 [2021-10-16 02:13:51,949 INFO L226 Difference]: Without dead ends: 55 [2021-10-16 02:13:51,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-16 02:13:51,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2021-10-16 02:13:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.71875) internal successors, (55), 32 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 55 transitions. [2021-10-16 02:13:51,965 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 55 transitions. Word has length 10 [2021-10-16 02:13:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 55 transitions. [2021-10-16 02:13:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 55 transitions. [2021-10-16 02:13:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:13:51,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:51,968 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:51,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:13:51,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:51,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash 258799873, now seen corresponding path program 1 times [2021-10-16 02:13:51,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:51,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893089166] [2021-10-16 02:13:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:51,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:52,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:52,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893089166] [2021-10-16 02:13:52,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893089166] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:52,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:52,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:52,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14249405] [2021-10-16 02:13:52,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:52,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:52,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:52,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,085 INFO L87 Difference]: Start difference. First operand 33 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:52,135 INFO L93 Difference]: Finished difference Result 55 states and 91 transitions. [2021-10-16 02:13:52,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:52,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:13:52,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:52,138 INFO L225 Difference]: With dead ends: 55 [2021-10-16 02:13:52,139 INFO L226 Difference]: Without dead ends: 53 [2021-10-16 02:13:52,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-16 02:13:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2021-10-16 02:13:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 54 transitions. [2021-10-16 02:13:52,150 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 54 transitions. Word has length 11 [2021-10-16 02:13:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:52,151 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 54 transitions. [2021-10-16 02:13:52,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 54 transitions. [2021-10-16 02:13:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:13:52,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:52,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:52,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:13:52,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:52,157 INFO L82 PathProgramCache]: Analyzing trace with hash -566924772, now seen corresponding path program 1 times [2021-10-16 02:13:52,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:52,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186133733] [2021-10-16 02:13:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:52,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:52,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:52,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186133733] [2021-10-16 02:13:52,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186133733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:52,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:52,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:52,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622647743] [2021-10-16 02:13:52,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:52,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,233 INFO L87 Difference]: Start difference. First operand 33 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:52,257 INFO L93 Difference]: Finished difference Result 53 states and 86 transitions. [2021-10-16 02:13:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:13:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:52,261 INFO L225 Difference]: With dead ends: 53 [2021-10-16 02:13:52,261 INFO L226 Difference]: Without dead ends: 51 [2021-10-16 02:13:52,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-16 02:13:52,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2021-10-16 02:13:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 53 transitions. [2021-10-16 02:13:52,273 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 53 transitions. Word has length 12 [2021-10-16 02:13:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:52,273 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 53 transitions. [2021-10-16 02:13:52,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 53 transitions. [2021-10-16 02:13:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:13:52,274 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:52,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:52,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:13:52,275 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash -394584650, now seen corresponding path program 1 times [2021-10-16 02:13:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:52,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256951773] [2021-10-16 02:13:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:52,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:52,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:52,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256951773] [2021-10-16 02:13:52,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256951773] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:52,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:52,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:52,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657124573] [2021-10-16 02:13:52,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:52,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,375 INFO L87 Difference]: Start difference. First operand 33 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:52,404 INFO L93 Difference]: Finished difference Result 51 states and 81 transitions. [2021-10-16 02:13:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:52,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-16 02:13:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:52,408 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:13:52,408 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:13:52,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:13:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-10-16 02:13:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.625) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2021-10-16 02:13:52,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 13 [2021-10-16 02:13:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:52,425 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2021-10-16 02:13:52,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2021-10-16 02:13:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:13:52,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:52,426 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:52,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:13:52,427 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash 652992177, now seen corresponding path program 1 times [2021-10-16 02:13:52,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:52,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126725177] [2021-10-16 02:13:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:52,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:52,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:52,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126725177] [2021-10-16 02:13:52,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126725177] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:52,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:52,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:52,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150921149] [2021-10-16 02:13:52,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:52,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:52,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,489 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:52,525 INFO L93 Difference]: Finished difference Result 49 states and 76 transitions. [2021-10-16 02:13:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 02:13:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:52,526 INFO L225 Difference]: With dead ends: 49 [2021-10-16 02:13:52,527 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 02:13:52,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 02:13:52,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2021-10-16 02:13:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 51 transitions. [2021-10-16 02:13:52,538 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 51 transitions. Word has length 14 [2021-10-16 02:13:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:52,538 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 51 transitions. [2021-10-16 02:13:52,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 51 transitions. [2021-10-16 02:13:52,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:13:52,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:52,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:52,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:13:52,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:52,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:52,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1231864213, now seen corresponding path program 1 times [2021-10-16 02:13:52,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:52,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816233522] [2021-10-16 02:13:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:52,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:52,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:52,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816233522] [2021-10-16 02:13:52,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816233522] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:52,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:52,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:52,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584186285] [2021-10-16 02:13:52,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:52,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:52,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:52,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,636 INFO L87 Difference]: Start difference. First operand 33 states and 51 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:52,703 INFO L93 Difference]: Finished difference Result 47 states and 71 transitions. [2021-10-16 02:13:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-16 02:13:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:52,704 INFO L225 Difference]: With dead ends: 47 [2021-10-16 02:13:52,704 INFO L226 Difference]: Without dead ends: 45 [2021-10-16 02:13:52,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-16 02:13:52,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-10-16 02:13:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2021-10-16 02:13:52,709 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 15 [2021-10-16 02:13:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:52,709 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 50 transitions. [2021-10-16 02:13:52,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 50 transitions. [2021-10-16 02:13:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:13:52,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:52,711 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:52,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 02:13:52,711 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:52,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:52,712 INFO L82 PathProgramCache]: Analyzing trace with hash 467130182, now seen corresponding path program 1 times [2021-10-16 02:13:52,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:52,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754732630] [2021-10-16 02:13:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:52,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:52,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:52,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754732630] [2021-10-16 02:13:52,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754732630] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:52,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:52,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:52,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284715905] [2021-10-16 02:13:52,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:52,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:52,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,825 INFO L87 Difference]: Start difference. First operand 33 states and 50 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:52,854 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2021-10-16 02:13:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:13:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:52,856 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:13:52,856 INFO L226 Difference]: Without dead ends: 43 [2021-10-16 02:13:52,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-16 02:13:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-10-16 02:13:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2021-10-16 02:13:52,861 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 16 [2021-10-16 02:13:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:52,861 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2021-10-16 02:13:52,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2021-10-16 02:13:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:13:52,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:52,863 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:52,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:13:52,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1596349216, now seen corresponding path program 1 times [2021-10-16 02:13:52,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:52,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570574923] [2021-10-16 02:13:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:52,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:52,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:52,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570574923] [2021-10-16 02:13:52,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570574923] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:52,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:52,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:52,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783626703] [2021-10-16 02:13:52,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:52,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,920 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:52,940 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2021-10-16 02:13:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:13:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:52,942 INFO L225 Difference]: With dead ends: 43 [2021-10-16 02:13:52,942 INFO L226 Difference]: Without dead ends: 41 [2021-10-16 02:13:52,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-16 02:13:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2021-10-16 02:13:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 48 transitions. [2021-10-16 02:13:52,946 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 48 transitions. Word has length 17 [2021-10-16 02:13:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:52,947 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 48 transitions. [2021-10-16 02:13:52,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 48 transitions. [2021-10-16 02:13:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:13:52,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:52,949 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:52,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 02:13:52,949 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:52,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2052566053, now seen corresponding path program 1 times [2021-10-16 02:13:52,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:52,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381243942] [2021-10-16 02:13:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:52,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:53,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:53,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381243942] [2021-10-16 02:13:53,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381243942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:53,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:53,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:53,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902799487] [2021-10-16 02:13:53,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:53,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:53,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:53,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:53,007 INFO L87 Difference]: Start difference. First operand 33 states and 48 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:53,037 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-10-16 02:13:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:53,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:13:53,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:53,041 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:13:53,041 INFO L226 Difference]: Without dead ends: 39 [2021-10-16 02:13:53,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-16 02:13:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-10-16 02:13:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2021-10-16 02:13:53,047 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 18 [2021-10-16 02:13:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:53,047 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2021-10-16 02:13:53,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2021-10-16 02:13:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:13:53,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:13:53,049 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:13:53,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-16 02:13:53,049 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:13:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:13:53,050 INFO L82 PathProgramCache]: Analyzing trace with hash 795177941, now seen corresponding path program 1 times [2021-10-16 02:13:53,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:13:53,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829014201] [2021-10-16 02:13:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:13:53,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:13:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:13:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:13:53,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:13:53,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829014201] [2021-10-16 02:13:53,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829014201] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:13:53,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:13:53,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:13:53,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142069570] [2021-10-16 02:13:53,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:13:53,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:13:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:13:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:53,125 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:13:53,146 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-10-16 02:13:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:13:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-16 02:13:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:13:53,147 INFO L225 Difference]: With dead ends: 35 [2021-10-16 02:13:53,147 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:13:53,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:13:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:13:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:13:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:13:53,150 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-10-16 02:13:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:13:53,150 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:13:53,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:13:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:13:53,151 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:13:53,154 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:13:53,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-16 02:13:53,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:13:53,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:13:53,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:13:53,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:13:53,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:13:53,176 INFO L860 garLoopResultBuilder]: At program point L217(lines 7 221) the Hoare annotation is: true [2021-10-16 02:13:53,176 INFO L857 garLoopResultBuilder]: For program point L151-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,177 INFO L857 garLoopResultBuilder]: For program point L201-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,177 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:13:53,177 INFO L857 garLoopResultBuilder]: For program point L152(line 152) no Hoare annotation was computed. [2021-10-16 02:13:53,177 INFO L857 garLoopResultBuilder]: For program point L202(line 202) no Hoare annotation was computed. [2021-10-16 02:13:53,177 INFO L857 garLoopResultBuilder]: For program point L186-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,177 INFO L860 garLoopResultBuilder]: At program point L220(lines 6 221) the Hoare annotation is: true [2021-10-16 02:13:53,177 INFO L857 garLoopResultBuilder]: For program point L187(line 187) no Hoare annotation was computed. [2021-10-16 02:13:53,178 INFO L857 garLoopResultBuilder]: For program point L55(lines 55 57) no Hoare annotation was computed. [2021-10-16 02:13:53,178 INFO L857 garLoopResultBuilder]: For program point L171-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,178 INFO L857 garLoopResultBuilder]: For program point L172(line 172) no Hoare annotation was computed. [2021-10-16 02:13:53,178 INFO L857 garLoopResultBuilder]: For program point L156-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,178 INFO L857 garLoopResultBuilder]: For program point L206-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,178 INFO L857 garLoopResultBuilder]: For program point L140-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,179 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:13:53,179 INFO L857 garLoopResultBuilder]: For program point L157(line 157) no Hoare annotation was computed. [2021-10-16 02:13:53,179 INFO L857 garLoopResultBuilder]: For program point L207(line 207) no Hoare annotation was computed. [2021-10-16 02:13:53,180 INFO L857 garLoopResultBuilder]: For program point L191-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,180 INFO L857 garLoopResultBuilder]: For program point L192(line 192) no Hoare annotation was computed. [2021-10-16 02:13:53,180 INFO L857 garLoopResultBuilder]: For program point L176-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,180 INFO L857 garLoopResultBuilder]: For program point L177(line 177) no Hoare annotation was computed. [2021-10-16 02:13:53,180 INFO L857 garLoopResultBuilder]: For program point L161-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,181 INFO L860 garLoopResultBuilder]: At program point L211-1(lines 53 216) the Hoare annotation is: true [2021-10-16 02:13:53,181 INFO L857 garLoopResultBuilder]: For program point L162(line 162) no Hoare annotation was computed. [2021-10-16 02:13:53,181 INFO L857 garLoopResultBuilder]: For program point L212(line 212) no Hoare annotation was computed. [2021-10-16 02:13:53,181 INFO L853 garLoopResultBuilder]: At program point L212-1(lines 7 221) the Hoare annotation is: false [2021-10-16 02:13:53,182 INFO L857 garLoopResultBuilder]: For program point L146-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,182 INFO L857 garLoopResultBuilder]: For program point L196-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,182 INFO L857 garLoopResultBuilder]: For program point L147(line 147) no Hoare annotation was computed. [2021-10-16 02:13:53,182 INFO L857 garLoopResultBuilder]: For program point L197(line 197) no Hoare annotation was computed. [2021-10-16 02:13:53,182 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 219) no Hoare annotation was computed. [2021-10-16 02:13:53,182 INFO L857 garLoopResultBuilder]: For program point L181-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,183 INFO L857 garLoopResultBuilder]: For program point L182(line 182) no Hoare annotation was computed. [2021-10-16 02:13:53,183 INFO L857 garLoopResultBuilder]: For program point L166-1(lines 53 216) no Hoare annotation was computed. [2021-10-16 02:13:53,183 INFO L857 garLoopResultBuilder]: For program point L167(line 167) no Hoare annotation was computed. [2021-10-16 02:13:53,188 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:13:53,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:13:53 BoogieIcfgContainer [2021-10-16 02:13:53,200 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:13:53,200 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:13:53,200 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:13:53,201 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:13:53,201 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:13:50" (3/4) ... [2021-10-16 02:13:53,205 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:13:53,223 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-10-16 02:13:53,224 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-16 02:13:53,225 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-16 02:13:53,226 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:13:53,326 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:13:53,326 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:13:53,328 INFO L168 Benchmark]: Toolchain (without parser) took 4145.28 ms. Allocated memory was 119.5 MB in the beginning and 146.8 MB in the end (delta: 27.3 MB). Free memory was 83.2 MB in the beginning and 82.4 MB in the end (delta: 839.4 kB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:53,328 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 119.5 MB. Free memory was 92.5 MB in the beginning and 92.5 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:13:53,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 408.52 ms. Allocated memory is still 119.5 MB. Free memory was 83.0 MB in the beginning and 93.4 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:53,330 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.58 ms. Allocated memory is still 119.5 MB. Free memory was 92.8 MB in the beginning and 91.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:13:53,330 INFO L168 Benchmark]: Boogie Preprocessor took 64.75 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 90.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:53,331 INFO L168 Benchmark]: RCFGBuilder took 920.33 ms. Allocated memory is still 119.5 MB. Free memory was 89.5 MB in the beginning and 61.3 MB in the end (delta: 28.2 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:53,331 INFO L168 Benchmark]: TraceAbstraction took 2535.84 ms. Allocated memory was 119.5 MB in the beginning and 146.8 MB in the end (delta: 27.3 MB). Free memory was 60.8 MB in the beginning and 87.6 MB in the end (delta: -26.9 MB). Peak memory consumption was 497.0 kB. Max. memory is 16.1 GB. [2021-10-16 02:13:53,332 INFO L168 Benchmark]: Witness Printer took 125.76 ms. Allocated memory is still 146.8 MB. Free memory was 86.6 MB in the beginning and 82.4 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:13:53,335 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 119.5 MB. Free memory was 92.5 MB in the beginning and 92.5 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 408.52 ms. Allocated memory is still 119.5 MB. Free memory was 83.0 MB in the beginning and 93.4 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 77.58 ms. Allocated memory is still 119.5 MB. Free memory was 92.8 MB in the beginning and 91.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.75 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 90.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 920.33 ms. Allocated memory is still 119.5 MB. Free memory was 89.5 MB in the beginning and 61.3 MB in the end (delta: 28.2 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2535.84 ms. Allocated memory was 119.5 MB in the beginning and 146.8 MB in the end (delta: 27.3 MB). Free memory was 60.8 MB in the beginning and 87.6 MB in the end (delta: -26.9 MB). Peak memory consumption was 497.0 kB. Max. memory is 16.1 GB. * Witness Printer took 125.76 ms. Allocated memory is still 146.8 MB. Free memory was 86.6 MB in the beginning and 82.4 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 219]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2464.1ms, OverallIterations: 14, TraceHistogramMax: 1, EmptinessCheckTime: 24.4ms, AutomataDifference: 639.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 20.5ms, InitialAbstractionConstructionTime: 13.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 712 SDtfs, 604 SDslu, 1074 SDs, 0 SdLazy, 146 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 287.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 148.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 155.2ms AutomataMinimizationTime, 14 MinimizatonAttempts, 234 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 9 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 7.0ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 77.1ms SsaConstructionTime, 307.2ms SatisfiabilityAnalysisTime, 915.8ms InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 819 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-16 02:13:53,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42763c2d-5565-4379-a975-94b03a1df399/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...