./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8 --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 afd688b49db4d2cf9e7e2109162780e9655a2ed2ed733e9c6c0c10bb8df3342c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:18:58,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:18:58,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:18:58,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:18:58,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:18:58,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:18:58,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:18:58,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:18:58,439 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:18:58,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:18:58,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:18:58,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:18:58,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:18:58,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:18:58,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:18:58,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:18:58,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:18:58,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:18:58,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:18:58,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:18:58,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:18:58,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:18:58,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:18:58,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:18:58,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:18:58,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:18:58,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:18:58,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:18:58,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:18:58,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:18:58,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:18:58,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:18:58,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:18:58,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:18:58,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:18:58,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:18:58,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:18:58,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:18:58,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:18:58,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:18:58,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:18:58,506 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:18:58,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:18:58,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:18:58,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:18:58,549 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:18:58,549 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:18:58,549 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:18:58,549 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:18:58,549 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:18:58,550 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:18:58,550 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:18:58,550 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:18:58,550 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:18:58,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:18:58,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:18:58,551 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:18:58,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:18:58,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:18:58,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:18:58,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:18:58,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:18:58,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:18:58,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:18:58,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:18:58,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:18:58,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:18:58,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:18:58,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:18:58,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:18:58,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:18:58,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:18:58,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:18:58,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:18:58,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:18:58,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:18:58,555 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:18:58,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:18:58,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:18:58,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:18:58,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:18:58,555 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_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afd688b49db4d2cf9e7e2109162780e9655a2ed2ed733e9c6c0c10bb8df3342c [2021-11-07 01:18:58,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:18:58,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:18:58,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:18:58,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:18:58,851 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:18:58,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-07 01:18:58,927 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/data/b08bd1148/e2c72d01db9342ed8f81f3ca803e4c78/FLAGc189d510a [2021-11-07 01:18:59,498 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:18:59,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-07 01:18:59,517 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/data/b08bd1148/e2c72d01db9342ed8f81f3ca803e4c78/FLAGc189d510a [2021-11-07 01:18:59,765 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/data/b08bd1148/e2c72d01db9342ed8f81f3ca803e4c78 [2021-11-07 01:18:59,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:18:59,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:18:59,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:18:59,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:18:59,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:18:59,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:18:59" (1/1) ... [2021-11-07 01:18:59,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b4ddd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:18:59, skipping insertion in model container [2021-11-07 01:18:59,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:18:59" (1/1) ... [2021-11-07 01:18:59,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:18:59,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:00,185 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_af2462d4-be69-408a-8d16-6bb400a6e76d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2021-11-07 01:19:00,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:00,324 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:19:00,444 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_af2462d4-be69-408a-8d16-6bb400a6e76d/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[12887,12900] [2021-11-07 01:19:00,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:00,520 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:19:00,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00 WrapperNode [2021-11-07 01:19:00,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:00,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:00,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:19:00,522 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:19:00,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:00,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:19:00,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:19:00,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:19:00,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:19:00,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:19:00,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:19:00,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:19:00,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (1/1) ... [2021-11-07 01:19:00,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:00,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:00,805 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:19:00,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af2462d4-be69-408a-8d16-6bb400a6e76d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:19:00,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:19:00,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:19:00,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:19:00,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:19:03,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:19:03,510 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:19:03,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:03 BoogieIcfgContainer [2021-11-07 01:19:03,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:19:03,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:19:03,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:19:03,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:19:03,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:18:59" (1/3) ... [2021-11-07 01:19:03,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622c0d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:03, skipping insertion in model container [2021-11-07 01:19:03,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:00" (2/3) ... [2021-11-07 01:19:03,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622c0d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:03, skipping insertion in model container [2021-11-07 01:19:03,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:03" (3/3) ... [2021-11-07 01:19:03,525 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-07 01:19:03,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:19:03,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:19:03,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:19:03,587 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, mAutomataTypeConcurrency=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 [2021-11-07 01:19:03,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:19:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 277 states, 275 states have (on average 1.5527272727272727) internal successors, (427), 276 states have internal predecessors, (427), 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) [2021-11-07 01:19:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:19:03,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:03,624 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:03,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:03,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:03,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1169256777, now seen corresponding path program 1 times [2021-11-07 01:19:03,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:03,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696004215] [2021-11-07 01:19:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:03,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:04,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:04,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696004215] [2021-11-07 01:19:04,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696004215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:04,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:04,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:04,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26038973] [2021-11-07 01:19:04,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:04,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:04,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:04,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:04,323 INFO L87 Difference]: Start difference. First operand has 277 states, 275 states have (on average 1.5527272727272727) internal successors, (427), 276 states have internal predecessors, (427), 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 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-11-07 01:19:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:04,437 INFO L93 Difference]: Finished difference Result 747 states and 1149 transitions. [2021-11-07 01:19:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) Word has length 54 [2021-11-07 01:19:04,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:04,455 INFO L225 Difference]: With dead ends: 747 [2021-11-07 01:19:04,455 INFO L226 Difference]: Without dead ends: 535 [2021-11-07 01:19:04,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-07 01:19:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 489. [2021-11-07 01:19:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.5061475409836065) internal successors, (735), 488 states have internal predecessors, (735), 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) [2021-11-07 01:19:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 735 transitions. [2021-11-07 01:19:04,534 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 735 transitions. Word has length 54 [2021-11-07 01:19:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:04,535 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 735 transitions. [2021-11-07 01:19:04,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-11-07 01:19:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 735 transitions. [2021-11-07 01:19:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:19:04,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:04,541 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:04,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:19:04,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash -55438132, now seen corresponding path program 1 times [2021-11-07 01:19:04,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:04,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84474667] [2021-11-07 01:19:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:04,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:04,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:04,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84474667] [2021-11-07 01:19:04,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84474667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:04,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:04,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:04,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075975189] [2021-11-07 01:19:04,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:04,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:04,763 INFO L87 Difference]: Start difference. First operand 489 states and 735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-07 01:19:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:04,860 INFO L93 Difference]: Finished difference Result 1288 states and 1935 transitions. [2021-11-07 01:19:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-07 01:19:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:04,868 INFO L225 Difference]: With dead ends: 1288 [2021-11-07 01:19:04,869 INFO L226 Difference]: Without dead ends: 937 [2021-11-07 01:19:04,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-07 01:19:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 847. [2021-11-07 01:19:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.4929078014184398) internal successors, (1263), 846 states have internal predecessors, (1263), 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) [2021-11-07 01:19:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1263 transitions. [2021-11-07 01:19:04,933 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1263 transitions. Word has length 60 [2021-11-07 01:19:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:04,933 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1263 transitions. [2021-11-07 01:19:04,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-07 01:19:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1263 transitions. [2021-11-07 01:19:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:19:04,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:04,947 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:04,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:19:04,947 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -269426590, now seen corresponding path program 1 times [2021-11-07 01:19:04,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:04,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103690711] [2021-11-07 01:19:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:04,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:05,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:05,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103690711] [2021-11-07 01:19:05,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103690711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:05,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:05,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:05,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973199638] [2021-11-07 01:19:05,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:05,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:05,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:05,129 INFO L87 Difference]: Start difference. First operand 847 states and 1263 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 01:19:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:05,219 INFO L93 Difference]: Finished difference Result 2183 states and 3249 transitions. [2021-11-07 01:19:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:19:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:05,232 INFO L225 Difference]: With dead ends: 2183 [2021-11-07 01:19:05,232 INFO L226 Difference]: Without dead ends: 1601 [2021-11-07 01:19:05,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-11-07 01:19:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1423. [2021-11-07 01:19:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 1.4732770745428974) internal successors, (2095), 1422 states have internal predecessors, (2095), 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) [2021-11-07 01:19:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 2095 transitions. [2021-11-07 01:19:05,337 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 2095 transitions. Word has length 66 [2021-11-07 01:19:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:05,337 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 2095 transitions. [2021-11-07 01:19:05,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-07 01:19:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 2095 transitions. [2021-11-07 01:19:05,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:19:05,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:05,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:05,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:19:05,342 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:05,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:05,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2034107416, now seen corresponding path program 1 times [2021-11-07 01:19:05,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:05,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059775797] [2021-11-07 01:19:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:05,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:05,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:05,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059775797] [2021-11-07 01:19:05,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059775797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:05,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:05,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:05,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100327003] [2021-11-07 01:19:05,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:05,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:05,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:05,517 INFO L87 Difference]: Start difference. First operand 1423 states and 2095 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-07 01:19:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:05,639 INFO L93 Difference]: Finished difference Result 3575 states and 5241 transitions. [2021-11-07 01:19:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-07 01:19:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:05,657 INFO L225 Difference]: With dead ends: 3575 [2021-11-07 01:19:05,657 INFO L226 Difference]: Without dead ends: 2649 [2021-11-07 01:19:05,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-11-07 01:19:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2295. [2021-11-07 01:19:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 1.443330427201395) internal successors, (3311), 2294 states have internal predecessors, (3311), 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) [2021-11-07 01:19:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3311 transitions. [2021-11-07 01:19:05,840 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3311 transitions. Word has length 72 [2021-11-07 01:19:05,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:05,840 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3311 transitions. [2021-11-07 01:19:05,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-07 01:19:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3311 transitions. [2021-11-07 01:19:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:19:05,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:05,847 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:05,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:19:05,848 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2696828, now seen corresponding path program 1 times [2021-11-07 01:19:05,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:05,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102817888] [2021-11-07 01:19:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:05,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:06,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:06,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102817888] [2021-11-07 01:19:06,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102817888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:06,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:06,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:19:06,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037167932] [2021-11-07 01:19:06,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:19:06,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:06,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:19:06,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:19:06,123 INFO L87 Difference]: Start difference. First operand 2295 states and 3311 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 6 states have internal predecessors, (78), 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) [2021-11-07 01:19:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:07,013 INFO L93 Difference]: Finished difference Result 8959 states and 12768 transitions. [2021-11-07 01:19:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:19:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 6 states have internal predecessors, (78), 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 78 [2021-11-07 01:19:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:07,055 INFO L225 Difference]: With dead ends: 8959 [2021-11-07 01:19:07,055 INFO L226 Difference]: Without dead ends: 7170 [2021-11-07 01:19:07,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:19:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2021-11-07 01:19:07,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 7164. [2021-11-07 01:19:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7163 states have (on average 1.4167248359625855) internal successors, (10148), 7163 states have internal predecessors, (10148), 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) [2021-11-07 01:19:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 10148 transitions. [2021-11-07 01:19:07,632 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 10148 transitions. Word has length 78 [2021-11-07 01:19:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:07,633 INFO L470 AbstractCegarLoop]: Abstraction has 7164 states and 10148 transitions. [2021-11-07 01:19:07,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 6 states have internal predecessors, (78), 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) [2021-11-07 01:19:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 10148 transitions. [2021-11-07 01:19:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:19:07,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:07,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:07,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:19:07,653 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1119941682, now seen corresponding path program 1 times [2021-11-07 01:19:07,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:07,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966764114] [2021-11-07 01:19:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:07,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:07,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:07,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966764114] [2021-11-07 01:19:07,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966764114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:07,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:07,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:07,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431620399] [2021-11-07 01:19:07,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:07,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:07,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:07,867 INFO L87 Difference]: Start difference. First operand 7164 states and 10148 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-11-07 01:19:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:08,556 INFO L93 Difference]: Finished difference Result 13014 states and 18474 transitions. [2021-11-07 01:19:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:08,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2021-11-07 01:19:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:08,600 INFO L225 Difference]: With dead ends: 13014 [2021-11-07 01:19:08,600 INFO L226 Difference]: Without dead ends: 6943 [2021-11-07 01:19:08,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-11-07 01:19:09,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 6941. [2021-11-07 01:19:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6941 states, 6940 states have (on average 1.419308357348703) internal successors, (9850), 6940 states have internal predecessors, (9850), 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) [2021-11-07 01:19:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6941 states to 6941 states and 9850 transitions. [2021-11-07 01:19:09,154 INFO L78 Accepts]: Start accepts. Automaton has 6941 states and 9850 transitions. Word has length 82 [2021-11-07 01:19:09,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:09,155 INFO L470 AbstractCegarLoop]: Abstraction has 6941 states and 9850 transitions. [2021-11-07 01:19:09,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-11-07 01:19:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6941 states and 9850 transitions. [2021-11-07 01:19:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:19:09,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:09,172 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:09,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:19:09,173 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:09,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:09,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1784447007, now seen corresponding path program 1 times [2021-11-07 01:19:09,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:09,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032778343] [2021-11-07 01:19:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:09,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:09,251 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:09,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032778343] [2021-11-07 01:19:09,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032778343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:09,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:09,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:09,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605557612] [2021-11-07 01:19:09,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:09,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:09,253 INFO L87 Difference]: Start difference. First operand 6941 states and 9850 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 01:19:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:10,035 INFO L93 Difference]: Finished difference Result 15779 states and 22294 transitions. [2021-11-07 01:19:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-07 01:19:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:10,091 INFO L225 Difference]: With dead ends: 15779 [2021-11-07 01:19:10,092 INFO L226 Difference]: Without dead ends: 11315 [2021-11-07 01:19:10,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2021-11-07 01:19:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11313. [2021-11-07 01:19:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11313 states, 11312 states have (on average 1.3992220650636493) internal successors, (15828), 11312 states have internal predecessors, (15828), 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) [2021-11-07 01:19:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 15828 transitions. [2021-11-07 01:19:10,989 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 15828 transitions. Word has length 85 [2021-11-07 01:19:10,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:10,989 INFO L470 AbstractCegarLoop]: Abstraction has 11313 states and 15828 transitions. [2021-11-07 01:19:10,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 01:19:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 15828 transitions. [2021-11-07 01:19:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:19:11,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:11,016 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:11,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:19:11,017 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:11,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1129978135, now seen corresponding path program 1 times [2021-11-07 01:19:11,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:11,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752864067] [2021-11-07 01:19:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:11,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:11,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:11,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752864067] [2021-11-07 01:19:11,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752864067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:11,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:11,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:11,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613311200] [2021-11-07 01:19:11,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:11,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:11,105 INFO L87 Difference]: Start difference. First operand 11313 states and 15828 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 01:19:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:11,667 INFO L93 Difference]: Finished difference Result 16917 states and 23718 transitions. [2021-11-07 01:19:11,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:11,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-07 01:19:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:11,685 INFO L225 Difference]: With dead ends: 16917 [2021-11-07 01:19:11,685 INFO L226 Difference]: Without dead ends: 7169 [2021-11-07 01:19:11,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:11,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7169 states. [2021-11-07 01:19:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7169 to 7167. [2021-11-07 01:19:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 1.380267931900642) internal successors, (9891), 7166 states have internal predecessors, (9891), 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) [2021-11-07 01:19:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 9891 transitions. [2021-11-07 01:19:12,224 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 9891 transitions. Word has length 85 [2021-11-07 01:19:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:12,225 INFO L470 AbstractCegarLoop]: Abstraction has 7167 states and 9891 transitions. [2021-11-07 01:19:12,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 01:19:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 9891 transitions. [2021-11-07 01:19:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:19:12,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:12,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:12,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:19:12,239 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash 271928379, now seen corresponding path program 1 times [2021-11-07 01:19:12,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:12,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148693808] [2021-11-07 01:19:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:12,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:12,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:12,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148693808] [2021-11-07 01:19:12,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148693808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:12,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:12,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 01:19:12,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292287457] [2021-11-07 01:19:12,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:19:12,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:19:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:19:12,710 INFO L87 Difference]: Start difference. First operand 7167 states and 9891 transitions. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2021-11-07 01:19:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:14,935 INFO L93 Difference]: Finished difference Result 19673 states and 27073 transitions. [2021-11-07 01:19:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:19:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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 85 [2021-11-07 01:19:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:14,974 INFO L225 Difference]: With dead ends: 19673 [2021-11-07 01:19:14,974 INFO L226 Difference]: Without dead ends: 13806 [2021-11-07 01:19:14,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:19:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13806 states. [2021-11-07 01:19:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13806 to 11141. [2021-11-07 01:19:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11141 states, 11140 states have (on average 1.353411131059246) internal successors, (15077), 11140 states have internal predecessors, (15077), 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) [2021-11-07 01:19:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11141 states to 11141 states and 15077 transitions. [2021-11-07 01:19:15,913 INFO L78 Accepts]: Start accepts. Automaton has 11141 states and 15077 transitions. Word has length 85 [2021-11-07 01:19:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:15,913 INFO L470 AbstractCegarLoop]: Abstraction has 11141 states and 15077 transitions. [2021-11-07 01:19:15,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 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) [2021-11-07 01:19:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11141 states and 15077 transitions. [2021-11-07 01:19:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:19:15,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:15,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:15,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:19:15,937 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:15,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1083557116, now seen corresponding path program 1 times [2021-11-07 01:19:15,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:15,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204096534] [2021-11-07 01:19:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:15,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:16,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:16,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204096534] [2021-11-07 01:19:16,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204096534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:16,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:16,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 01:19:16,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995893297] [2021-11-07 01:19:16,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 01:19:16,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 01:19:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:19:16,842 INFO L87 Difference]: Start difference. First operand 11141 states and 15077 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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) [2021-11-07 01:19:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:21,935 INFO L93 Difference]: Finished difference Result 30814 states and 41697 transitions. [2021-11-07 01:19:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 01:19:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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 85 [2021-11-07 01:19:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:21,976 INFO L225 Difference]: With dead ends: 30814 [2021-11-07 01:19:21,976 INFO L226 Difference]: Without dead ends: 19115 [2021-11-07 01:19:21,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=376, Invalid=1184, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 01:19:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19115 states. [2021-11-07 01:19:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19115 to 15367. [2021-11-07 01:19:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15367 states, 15366 states have (on average 1.324417545229728) internal successors, (20351), 15366 states have internal predecessors, (20351), 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) [2021-11-07 01:19:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15367 states to 15367 states and 20351 transitions. [2021-11-07 01:19:23,609 INFO L78 Accepts]: Start accepts. Automaton has 15367 states and 20351 transitions. Word has length 85 [2021-11-07 01:19:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:23,609 INFO L470 AbstractCegarLoop]: Abstraction has 15367 states and 20351 transitions. [2021-11-07 01:19:23,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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) [2021-11-07 01:19:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 15367 states and 20351 transitions. [2021-11-07 01:19:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:19:23,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:23,647 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:23,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:19:23,648 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:23,648 INFO L85 PathProgramCache]: Analyzing trace with hash 528376411, now seen corresponding path program 1 times [2021-11-07 01:19:23,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:23,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533206270] [2021-11-07 01:19:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:23,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:23,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:23,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533206270] [2021-11-07 01:19:23,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533206270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:23,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:23,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:23,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280712077] [2021-11-07 01:19:23,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:23,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:23,717 INFO L87 Difference]: Start difference. First operand 15367 states and 20351 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 01:19:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:25,097 INFO L93 Difference]: Finished difference Result 30352 states and 40085 transitions. [2021-11-07 01:19:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-07 01:19:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:25,136 INFO L225 Difference]: With dead ends: 30352 [2021-11-07 01:19:25,137 INFO L226 Difference]: Without dead ends: 21111 [2021-11-07 01:19:25,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:25,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21111 states. [2021-11-07 01:19:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21111 to 21109. [2021-11-07 01:19:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 21108 states have (on average 1.3017339397384877) internal successors, (27477), 21108 states have internal predecessors, (27477), 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) [2021-11-07 01:19:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 27477 transitions. [2021-11-07 01:19:26,609 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 27477 transitions. Word has length 87 [2021-11-07 01:19:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:26,609 INFO L470 AbstractCegarLoop]: Abstraction has 21109 states and 27477 transitions. [2021-11-07 01:19:26,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 01:19:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 27477 transitions. [2021-11-07 01:19:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:19:26,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:26,635 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:26,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:19:26,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1887992375, now seen corresponding path program 1 times [2021-11-07 01:19:26,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:26,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964324970] [2021-11-07 01:19:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:26,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:26,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:26,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964324970] [2021-11-07 01:19:26,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964324970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:26,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:26,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:26,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236125748] [2021-11-07 01:19:26,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:26,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:26,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:26,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:26,700 INFO L87 Difference]: Start difference. First operand 21109 states and 27477 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 01:19:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:28,257 INFO L93 Difference]: Finished difference Result 25516 states and 33090 transitions. [2021-11-07 01:19:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:28,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-07 01:19:28,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:28,291 INFO L225 Difference]: With dead ends: 25516 [2021-11-07 01:19:28,292 INFO L226 Difference]: Without dead ends: 20506 [2021-11-07 01:19:28,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20506 states. [2021-11-07 01:19:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20506 to 20504. [2021-11-07 01:19:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20504 states, 20503 states have (on average 1.2898112471345657) internal successors, (26445), 20503 states have internal predecessors, (26445), 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) [2021-11-07 01:19:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20504 states to 20504 states and 26445 transitions. [2021-11-07 01:19:29,951 INFO L78 Accepts]: Start accepts. Automaton has 20504 states and 26445 transitions. Word has length 87 [2021-11-07 01:19:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:29,952 INFO L470 AbstractCegarLoop]: Abstraction has 20504 states and 26445 transitions. [2021-11-07 01:19:29,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 01:19:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 20504 states and 26445 transitions. [2021-11-07 01:19:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:19:29,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:29,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:29,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:19:29,978 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash 930356123, now seen corresponding path program 1 times [2021-11-07 01:19:29,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:29,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441640098] [2021-11-07 01:19:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:29,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:30,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:30,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441640098] [2021-11-07 01:19:30,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441640098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:30,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:30,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:30,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961738982] [2021-11-07 01:19:30,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:30,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:30,048 INFO L87 Difference]: Start difference. First operand 20504 states and 26445 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 01:19:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:31,369 INFO L93 Difference]: Finished difference Result 26764 states and 34411 transitions. [2021-11-07 01:19:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:31,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 87 [2021-11-07 01:19:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:31,391 INFO L225 Difference]: With dead ends: 26764 [2021-11-07 01:19:31,391 INFO L226 Difference]: Without dead ends: 19272 [2021-11-07 01:19:31,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19272 states. [2021-11-07 01:19:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19272 to 19270. [2021-11-07 01:19:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19270 states, 19269 states have (on average 1.2791011469199232) internal successors, (24647), 19269 states have internal predecessors, (24647), 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) [2021-11-07 01:19:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19270 states to 19270 states and 24647 transitions. [2021-11-07 01:19:32,567 INFO L78 Accepts]: Start accepts. Automaton has 19270 states and 24647 transitions. Word has length 87 [2021-11-07 01:19:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:32,567 INFO L470 AbstractCegarLoop]: Abstraction has 19270 states and 24647 transitions. [2021-11-07 01:19:32,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2021-11-07 01:19:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 19270 states and 24647 transitions. [2021-11-07 01:19:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:19:32,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:32,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:32,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:19:32,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:32,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1600982746, now seen corresponding path program 1 times [2021-11-07 01:19:32,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:32,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420785499] [2021-11-07 01:19:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:32,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:32,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:32,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420785499] [2021-11-07 01:19:32,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420785499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:32,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:32,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:19:32,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082744306] [2021-11-07 01:19:32,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:19:32,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:32,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:19:32,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:19:32,841 INFO L87 Difference]: Start difference. First operand 19270 states and 24647 transitions. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2021-11-07 01:19:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:38,749 INFO L93 Difference]: Finished difference Result 71696 states and 90873 transitions. [2021-11-07 01:19:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:19:38,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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 88 [2021-11-07 01:19:38,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:38,837 INFO L225 Difference]: With dead ends: 71696 [2021-11-07 01:19:38,837 INFO L226 Difference]: Without dead ends: 55422 [2021-11-07 01:19:38,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:19:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55422 states. [2021-11-07 01:19:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55422 to 40051. [2021-11-07 01:19:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40051 states, 40050 states have (on average 1.2590262172284645) internal successors, (50424), 40050 states have internal predecessors, (50424), 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) [2021-11-07 01:19:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40051 states to 40051 states and 50424 transitions. [2021-11-07 01:19:42,163 INFO L78 Accepts]: Start accepts. Automaton has 40051 states and 50424 transitions. Word has length 88 [2021-11-07 01:19:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:42,163 INFO L470 AbstractCegarLoop]: Abstraction has 40051 states and 50424 transitions. [2021-11-07 01:19:42,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 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) [2021-11-07 01:19:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 40051 states and 50424 transitions. [2021-11-07 01:19:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:19:42,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:42,210 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:42,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:19:42,211 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1931120843, now seen corresponding path program 1 times [2021-11-07 01:19:42,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:42,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22901289] [2021-11-07 01:19:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:42,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:42,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:42,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22901289] [2021-11-07 01:19:42,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22901289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:42,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:42,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-07 01:19:42,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561001815] [2021-11-07 01:19:42,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:19:42,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:42,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:19:42,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:19:42,821 INFO L87 Difference]: Start difference. First operand 40051 states and 50424 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 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) [2021-11-07 01:19:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:50,233 INFO L93 Difference]: Finished difference Result 58431 states and 73378 transitions. [2021-11-07 01:19:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 01:19:50,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 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 88 [2021-11-07 01:19:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:50,306 INFO L225 Difference]: With dead ends: 58431 [2021-11-07 01:19:50,306 INFO L226 Difference]: Without dead ends: 48477 [2021-11-07 01:19:50,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2021-11-07 01:19:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48477 states. [2021-11-07 01:19:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48477 to 41479. [2021-11-07 01:19:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41479 states, 41478 states have (on average 1.255316071170259) internal successors, (52068), 41478 states have internal predecessors, (52068), 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) [2021-11-07 01:19:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41479 states to 41479 states and 52068 transitions. [2021-11-07 01:19:54,399 INFO L78 Accepts]: Start accepts. Automaton has 41479 states and 52068 transitions. Word has length 88 [2021-11-07 01:19:54,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:54,399 INFO L470 AbstractCegarLoop]: Abstraction has 41479 states and 52068 transitions. [2021-11-07 01:19:54,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 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) [2021-11-07 01:19:54,399 INFO L276 IsEmpty]: Start isEmpty. Operand 41479 states and 52068 transitions. [2021-11-07 01:19:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:19:54,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:54,428 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:54,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:19:54,428 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:19:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1270234033, now seen corresponding path program 1 times [2021-11-07 01:19:54,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:54,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685403061] [2021-11-07 01:19:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:54,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:54,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:54,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685403061] [2021-11-07 01:19:54,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685403061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:54,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:54,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:19:54,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980669632] [2021-11-07 01:19:54,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:54,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:54,551 INFO L87 Difference]: Start difference. First operand 41479 states and 52068 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-07 01:20:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:01,343 INFO L93 Difference]: Finished difference Result 108891 states and 136417 transitions. [2021-11-07 01:20:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:20:01,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 88 [2021-11-07 01:20:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:01,449 INFO L225 Difference]: With dead ends: 108891 [2021-11-07 01:20:01,449 INFO L226 Difference]: Without dead ends: 67422 [2021-11-07 01:20:01,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:20:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67422 states. [2021-11-07 01:20:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67422 to 57264. [2021-11-07 01:20:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57264 states, 57263 states have (on average 1.238251576061331) internal successors, (70906), 57263 states have internal predecessors, (70906), 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) [2021-11-07 01:20:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57264 states to 57264 states and 70906 transitions. [2021-11-07 01:20:07,424 INFO L78 Accepts]: Start accepts. Automaton has 57264 states and 70906 transitions. Word has length 88 [2021-11-07 01:20:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:07,424 INFO L470 AbstractCegarLoop]: Abstraction has 57264 states and 70906 transitions. [2021-11-07 01:20:07,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2021-11-07 01:20:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 57264 states and 70906 transitions. [2021-11-07 01:20:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:20:07,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:07,621 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:07,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 01:20:07,621 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:20:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1760515289, now seen corresponding path program 1 times [2021-11-07 01:20:07,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:07,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360933075] [2021-11-07 01:20:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:07,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:07,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:07,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360933075] [2021-11-07 01:20:07,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360933075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:07,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:07,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:20:07,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572319864] [2021-11-07 01:20:07,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:20:07,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:20:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:07,768 INFO L87 Difference]: Start difference. First operand 57264 states and 70906 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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)