./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta --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 2b9ed7c85c1e945b329b46ea2facde1ef0195f46b3e9e9585453dabdeb816de5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:39:51,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:39:51,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:39:51,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:39:51,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:39:51,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:39:51,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:39:51,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:39:51,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:39:51,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:39:51,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:39:51,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:39:51,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:39:51,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:39:51,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:39:51,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:39:51,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:39:51,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:39:51,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:39:51,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:39:51,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:39:51,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:39:51,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:39:51,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:39:51,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:39:51,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:39:51,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:39:51,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:39:51,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:39:51,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:39:51,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:39:51,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:39:51,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:39:51,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:39:51,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:39:51,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:39:51,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:39:51,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:39:51,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:39:51,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:39:51,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:39:51,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:39:51,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:39:51,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:39:51,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:39:51,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:39:51,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:39:51,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:39:51,680 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:39:51,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:39:51,701 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:39:51,701 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:39:51,702 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:39:51,702 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:39:51,702 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:39:51,702 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:39:51,703 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:39:51,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:39:51,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:39:51,703 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:39:51,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:39:51,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:39:51,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:39:51,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:39:51,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:39:51,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:39:51,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:39:51,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:39:51,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:39:51,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:39:51,707 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:39:51,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:39:51,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:39:51,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:39:51,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:51,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:39:51,709 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:39:51,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:39:51,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:39:51,710 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:39:51,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:39:51,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:39:51,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:39:51,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b9ed7c85c1e945b329b46ea2facde1ef0195f46b3e9e9585453dabdeb816de5 [2022-10-17 17:39:51,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:39:52,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:39:52,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:39:52,025 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:39:52,025 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:39:52,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-10-17 17:39:52,099 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/data/5baa6e02e/d960fbf8755e42eeb080649776b124f8/FLAG604c637df [2022-10-17 17:39:52,629 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:39:52,629 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-10-17 17:39:52,656 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/data/5baa6e02e/d960fbf8755e42eeb080649776b124f8/FLAG604c637df [2022-10-17 17:39:52,966 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/data/5baa6e02e/d960fbf8755e42eeb080649776b124f8 [2022-10-17 17:39:52,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:39:52,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:39:52,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:52,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:39:52,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:39:52,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:52" (1/1) ... [2022-10-17 17:39:52,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:52, skipping insertion in model container [2022-10-17 17:39:52,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:52" (1/1) ... [2022-10-17 17:39:52,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:39:53,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:39:53,228 WARN L230 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_e3a988b5-8eee-4f6c-b557-44427bc772c0/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[911,924] [2022-10-17 17:39:53,295 WARN L230 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_e3a988b5-8eee-4f6c-b557-44427bc772c0/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[8416,8429] [2022-10-17 17:39:53,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:53,389 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:39:53,402 WARN L230 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_e3a988b5-8eee-4f6c-b557-44427bc772c0/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[911,924] [2022-10-17 17:39:53,430 WARN L230 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_e3a988b5-8eee-4f6c-b557-44427bc772c0/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[8416,8429] [2022-10-17 17:39:53,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:53,511 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:39:53,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53 WrapperNode [2022-10-17 17:39:53,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:53,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:53,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:39:53,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:39:53,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,600 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 672 [2022-10-17 17:39:53,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:53,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:39:53,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:39:53,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:39:53,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,647 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:39:53,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:39:53,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:39:53,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:39:53,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (1/1) ... [2022-10-17 17:39:53,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:53,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:53,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:39:53,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:39:53,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:39:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-10-17 17:39:53,799 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-10-17 17:39:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-10-17 17:39:53,799 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-10-17 17:39:53,799 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-10-17 17:39:53,800 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-10-17 17:39:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-10-17 17:39:53,800 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-10-17 17:39:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-10-17 17:39:53,800 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-10-17 17:39:53,800 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-10-17 17:39:53,801 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-10-17 17:39:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-10-17 17:39:53,801 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-10-17 17:39:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-10-17 17:39:53,801 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-10-17 17:39:53,801 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-10-17 17:39:53,802 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-10-17 17:39:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-10-17 17:39:53,802 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-10-17 17:39:53,802 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-10-17 17:39:53,802 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-10-17 17:39:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:39:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-10-17 17:39:53,803 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-10-17 17:39:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-10-17 17:39:53,803 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-10-17 17:39:53,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:39:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:39:53,804 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-10-17 17:39:53,804 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-10-17 17:39:53,987 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:39:53,989 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:39:54,829 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-10-17 17:39:54,829 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-10-17 17:39:54,887 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:39:55,284 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:39:55,285 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-10-17 17:39:55,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:55 BoogieIcfgContainer [2022-10-17 17:39:55,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:39:55,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:39:55,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:39:55,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:39:55,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:39:52" (1/3) ... [2022-10-17 17:39:55,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b30130a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:55, skipping insertion in model container [2022-10-17 17:39:55,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:53" (2/3) ... [2022-10-17 17:39:55,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b30130a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:55, skipping insertion in model container [2022-10-17 17:39:55,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:55" (3/3) ... [2022-10-17 17:39:55,302 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-10-17 17:39:55,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:39:55,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 17:39:55,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:39:55,426 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@36b6323a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:39:55,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-10-17 17:39:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 144 states have internal predecessors, (209), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-10-17 17:39:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:39:55,444 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:55,445 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:39:55,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash 301180781, now seen corresponding path program 1 times [2022-10-17 17:39:55,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:55,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139585226] [2022-10-17 17:39:55,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:55,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:55,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139585226] [2022-10-17 17:39:55,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139585226] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:55,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:55,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:39:55,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473862326] [2022-10-17 17:39:55,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:55,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:39:55,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:39:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:39:55,922 INFO L87 Difference]: Start difference. First operand has 190 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 144 states have internal predecessors, (209), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:39:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:56,510 INFO L93 Difference]: Finished difference Result 503 states and 736 transitions. [2022-10-17 17:39:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:39:56,514 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-10-17 17:39:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:56,542 INFO L225 Difference]: With dead ends: 503 [2022-10-17 17:39:56,542 INFO L226 Difference]: Without dead ends: 314 [2022-10-17 17:39:56,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:39:56,557 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 331 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:56,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 510 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:39:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-10-17 17:39:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 303. [2022-10-17 17:39:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 219 states have (on average 1.4109589041095891) internal successors, (309), 223 states have internal predecessors, (309), 55 states have call successors, (55), 28 states have call predecessors, (55), 27 states have return successors, (56), 53 states have call predecessors, (56), 53 states have call successors, (56) [2022-10-17 17:39:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 420 transitions. [2022-10-17 17:39:56,658 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 420 transitions. Word has length 44 [2022-10-17 17:39:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:56,658 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 420 transitions. [2022-10-17 17:39:56,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:39:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 420 transitions. [2022-10-17 17:39:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 17:39:56,663 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:56,663 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:39:56,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:39:56,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1834054908, now seen corresponding path program 1 times [2022-10-17 17:39:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692941581] [2022-10-17 17:39:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:56,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:56,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:56,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692941581] [2022-10-17 17:39:56,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692941581] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:56,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:56,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:39:56,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186088276] [2022-10-17 17:39:56,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:56,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:39:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:39:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:39:56,834 INFO L87 Difference]: Start difference. First operand 303 states and 420 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:39:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:57,723 INFO L93 Difference]: Finished difference Result 840 states and 1143 transitions. [2022-10-17 17:39:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:39:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-10-17 17:39:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:57,732 INFO L225 Difference]: With dead ends: 840 [2022-10-17 17:39:57,732 INFO L226 Difference]: Without dead ends: 374 [2022-10-17 17:39:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:39:57,739 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 750 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:57,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 919 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:39:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-10-17 17:39:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 289. [2022-10-17 17:39:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 205 states have (on average 1.3463414634146342) internal successors, (276), 209 states have internal predecessors, (276), 55 states have call successors, (55), 28 states have call predecessors, (55), 27 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-10-17 17:39:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 384 transitions. [2022-10-17 17:39:57,807 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 384 transitions. Word has length 45 [2022-10-17 17:39:57,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:57,808 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 384 transitions. [2022-10-17 17:39:57,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 17:39:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 384 transitions. [2022-10-17 17:39:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:39:57,815 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:57,816 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:39:57,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:39:57,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:57,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash 174691287, now seen corresponding path program 1 times [2022-10-17 17:39:57,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:57,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426331512] [2022-10-17 17:39:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:57,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:58,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426331512] [2022-10-17 17:39:58,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426331512] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:58,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:58,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:39:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117761500] [2022-10-17 17:39:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:58,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:39:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:39:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:39:58,109 INFO L87 Difference]: Start difference. First operand 289 states and 384 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:39:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:58,861 INFO L93 Difference]: Finished difference Result 591 states and 752 transitions. [2022-10-17 17:39:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 17:39:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-10-17 17:39:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:58,868 INFO L225 Difference]: With dead ends: 591 [2022-10-17 17:39:58,869 INFO L226 Difference]: Without dead ends: 417 [2022-10-17 17:39:58,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:39:58,879 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 388 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:58,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 810 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:39:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-10-17 17:39:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 391. [2022-10-17 17:39:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 273 states have (on average 1.3113553113553114) internal successors, (358), 277 states have internal predecessors, (358), 75 states have call successors, (75), 42 states have call predecessors, (75), 41 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-10-17 17:39:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 506 transitions. [2022-10-17 17:39:58,951 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 506 transitions. Word has length 46 [2022-10-17 17:39:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:58,952 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 506 transitions. [2022-10-17 17:39:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-10-17 17:39:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 506 transitions. [2022-10-17 17:39:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:39:58,956 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:58,957 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:39:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:39:58,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:58,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash -877904287, now seen corresponding path program 1 times [2022-10-17 17:39:58,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:58,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225605926] [2022-10-17 17:39:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:59,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:59,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225605926] [2022-10-17 17:39:59,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225605926] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:59,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:59,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:39:59,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37854006] [2022-10-17 17:39:59,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:59,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:39:59,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:39:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:39:59,089 INFO L87 Difference]: Start difference. First operand 391 states and 506 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:39:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:59,212 INFO L93 Difference]: Finished difference Result 656 states and 842 transitions. [2022-10-17 17:39:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:39:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-10-17 17:39:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:59,214 INFO L225 Difference]: With dead ends: 656 [2022-10-17 17:39:59,215 INFO L226 Difference]: Without dead ends: 110 [2022-10-17 17:39:59,216 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:39:59,217 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 231 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:59,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 203 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:39:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-17 17:39:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-10-17 17:39:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 85 states have internal predecessors, (123), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-10-17 17:39:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 161 transitions. [2022-10-17 17:39:59,235 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 161 transitions. Word has length 47 [2022-10-17 17:39:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:59,239 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 161 transitions. [2022-10-17 17:39:59,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:39:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 161 transitions. [2022-10-17 17:39:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 17:39:59,241 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:59,242 INFO L195 NwaCegarLoop]: 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] [2022-10-17 17:39:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:39:59,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash 126691969, now seen corresponding path program 1 times [2022-10-17 17:39:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:59,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574792348] [2022-10-17 17:39:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:39:59,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:59,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574792348] [2022-10-17 17:39:59,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574792348] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:59,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:59,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:39:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400185295] [2022-10-17 17:39:59,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:39:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:39:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:39:59,418 INFO L87 Difference]: Start difference. First operand 110 states and 161 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:40:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:00,057 INFO L93 Difference]: Finished difference Result 603 states and 941 transitions. [2022-10-17 17:40:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:40:00,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-10-17 17:40:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:00,066 INFO L225 Difference]: With dead ends: 603 [2022-10-17 17:40:00,066 INFO L226 Difference]: Without dead ends: 499 [2022-10-17 17:40:00,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:00,069 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 671 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:00,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 691 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:40:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-10-17 17:40:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 488. [2022-10-17 17:40:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 381 states have (on average 1.4619422572178478) internal successors, (557), 385 states have internal predecessors, (557), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (110), 73 states have call predecessors, (110), 76 states have call successors, (110) [2022-10-17 17:40:00,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 743 transitions. [2022-10-17 17:40:00,154 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 743 transitions. Word has length 46 [2022-10-17 17:40:00,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:00,154 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 743 transitions. [2022-10-17 17:40:00,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:40:00,155 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 743 transitions. [2022-10-17 17:40:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:40:00,158 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:00,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:00,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:40:00,159 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 518975534, now seen corresponding path program 1 times [2022-10-17 17:40:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:00,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818697847] [2022-10-17 17:40:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:00,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:40:00,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818697847] [2022-10-17 17:40:00,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818697847] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673563764] [2022-10-17 17:40:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:00,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:00,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:00,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:00,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:40:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:40:00,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:40:00,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:00,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673563764] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:00,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:00,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:40:00,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373530799] [2022-10-17 17:40:00,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:00,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:00,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:00,662 INFO L87 Difference]: Start difference. First operand 488 states and 743 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:40:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:00,932 INFO L93 Difference]: Finished difference Result 1436 states and 2248 transitions. [2022-10-17 17:40:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:00,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-10-17 17:40:00,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:00,950 INFO L225 Difference]: With dead ends: 1436 [2022-10-17 17:40:00,950 INFO L226 Difference]: Without dead ends: 954 [2022-10-17 17:40:00,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:00,958 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 130 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:00,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-10-17 17:40:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 947. [2022-10-17 17:40:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 743 states have (on average 1.4535666218034993) internal successors, (1080), 750 states have internal predecessors, (1080), 143 states have call successors, (143), 60 states have call predecessors, (143), 60 states have return successors, (207), 137 states have call predecessors, (207), 143 states have call successors, (207) [2022-10-17 17:40:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1430 transitions. [2022-10-17 17:40:01,107 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1430 transitions. Word has length 87 [2022-10-17 17:40:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:01,108 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1430 transitions. [2022-10-17 17:40:01,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:40:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1430 transitions. [2022-10-17 17:40:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:40:01,112 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:01,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:01,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:01,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:01,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash 915455212, now seen corresponding path program 1 times [2022-10-17 17:40:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:01,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511027861] [2022-10-17 17:40:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 17:40:01,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:01,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511027861] [2022-10-17 17:40:01,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511027861] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641718436] [2022-10-17 17:40:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:01,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:01,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:01,468 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:01,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:40:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:40:01,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 17:40:01,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:01,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641718436] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:01,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:01,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-10-17 17:40:01,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640197035] [2022-10-17 17:40:01,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:01,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:01,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:01,715 INFO L87 Difference]: Start difference. First operand 947 states and 1430 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:40:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:01,959 INFO L93 Difference]: Finished difference Result 2798 states and 4338 transitions. [2022-10-17 17:40:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:01,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-10-17 17:40:01,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:01,976 INFO L225 Difference]: With dead ends: 2798 [2022-10-17 17:40:01,976 INFO L226 Difference]: Without dead ends: 1857 [2022-10-17 17:40:01,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:01,982 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 133 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:01,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-10-17 17:40:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1845. [2022-10-17 17:40:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1452 states have (on average 1.443526170798898) internal successors, (2096), 1465 states have internal predecessors, (2096), 272 states have call successors, (272), 120 states have call predecessors, (272), 120 states have return successors, (392), 260 states have call predecessors, (392), 272 states have call successors, (392) [2022-10-17 17:40:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2760 transitions. [2022-10-17 17:40:02,197 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2760 transitions. Word has length 87 [2022-10-17 17:40:02,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:02,197 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2760 transitions. [2022-10-17 17:40:02,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-10-17 17:40:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2760 transitions. [2022-10-17 17:40:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:40:02,204 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:02,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:02,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-17 17:40:02,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 17:40:02,432 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:02,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1281478510, now seen corresponding path program 1 times [2022-10-17 17:40:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:02,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695716923] [2022-10-17 17:40:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 17:40:02,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:02,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695716923] [2022-10-17 17:40:02,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695716923] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:02,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:02,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:40:02,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175638884] [2022-10-17 17:40:02,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:02,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:02,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:02,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:02,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:40:02,543 INFO L87 Difference]: Start difference. First operand 1845 states and 2760 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:40:02,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:02,831 INFO L93 Difference]: Finished difference Result 3743 states and 5729 transitions. [2022-10-17 17:40:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:02,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-10-17 17:40:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:02,855 INFO L225 Difference]: With dead ends: 3743 [2022-10-17 17:40:02,856 INFO L226 Difference]: Without dead ends: 2269 [2022-10-17 17:40:02,863 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:40:02,864 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:02,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 335 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-10-17 17:40:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2089. [2022-10-17 17:40:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1680 states have (on average 1.4785714285714286) internal successors, (2484), 1693 states have internal predecessors, (2484), 280 states have call successors, (280), 128 states have call predecessors, (280), 128 states have return successors, (400), 268 states have call predecessors, (400), 280 states have call successors, (400) [2022-10-17 17:40:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3164 transitions. [2022-10-17 17:40:03,094 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3164 transitions. Word has length 87 [2022-10-17 17:40:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:03,095 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 3164 transitions. [2022-10-17 17:40:03,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-10-17 17:40:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3164 transitions. [2022-10-17 17:40:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-10-17 17:40:03,110 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:03,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:03,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:40:03,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash 199797023, now seen corresponding path program 1 times [2022-10-17 17:40:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:03,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325019253] [2022-10-17 17:40:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:03,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-17 17:40:03,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:03,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325019253] [2022-10-17 17:40:03,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325019253] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:03,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:03,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:40:03,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715226135] [2022-10-17 17:40:03,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:03,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:03,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:40:03,245 INFO L87 Difference]: Start difference. First operand 2089 states and 3164 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:40:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:03,670 INFO L93 Difference]: Finished difference Result 6166 states and 9533 transitions. [2022-10-17 17:40:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:03,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-10-17 17:40:03,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:03,711 INFO L225 Difference]: With dead ends: 6166 [2022-10-17 17:40:03,712 INFO L226 Difference]: Without dead ends: 4083 [2022-10-17 17:40:03,722 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:40:03,724 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:03,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-10-17 17:40:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4053. [2022-10-17 17:40:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 3260 states have (on average 1.463803680981595) internal successors, (4772), 3285 states have internal predecessors, (4772), 536 states have call successors, (536), 256 states have call predecessors, (536), 256 states have return successors, (760), 512 states have call predecessors, (760), 536 states have call successors, (760) [2022-10-17 17:40:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6068 transitions. [2022-10-17 17:40:04,197 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6068 transitions. Word has length 116 [2022-10-17 17:40:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:04,198 INFO L495 AbstractCegarLoop]: Abstraction has 4053 states and 6068 transitions. [2022-10-17 17:40:04,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:40:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6068 transitions. [2022-10-17 17:40:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-10-17 17:40:04,215 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:04,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:04,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:40:04,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:04,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1430016577, now seen corresponding path program 1 times [2022-10-17 17:40:04,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:04,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108183979] [2022-10-17 17:40:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-17 17:40:04,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:04,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108183979] [2022-10-17 17:40:04,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108183979] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:04,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:40:04,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:40:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767469747] [2022-10-17 17:40:04,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:40:04,367 INFO L87 Difference]: Start difference. First operand 4053 states and 6068 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:40:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:05,153 INFO L93 Difference]: Finished difference Result 11970 states and 18269 transitions. [2022-10-17 17:40:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-10-17 17:40:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:05,229 INFO L225 Difference]: With dead ends: 11970 [2022-10-17 17:40:05,229 INFO L226 Difference]: Without dead ends: 7923 [2022-10-17 17:40:05,257 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:40:05,258 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 129 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:05,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2022-10-17 17:40:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7865. [2022-10-17 17:40:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 6324 states have (on average 1.4478178368121442) internal successors, (9156), 6373 states have internal predecessors, (9156), 1028 states have call successors, (1028), 512 states have call predecessors, (1028), 512 states have return successors, (1444), 980 states have call predecessors, (1444), 1028 states have call successors, (1444) [2022-10-17 17:40:06,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11628 transitions. [2022-10-17 17:40:06,259 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11628 transitions. Word has length 116 [2022-10-17 17:40:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:06,260 INFO L495 AbstractCegarLoop]: Abstraction has 7865 states and 11628 transitions. [2022-10-17 17:40:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:40:06,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11628 transitions. [2022-10-17 17:40:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-10-17 17:40:06,305 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:06,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:06,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 17:40:06,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:06,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:06,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1687523156, now seen corresponding path program 1 times [2022-10-17 17:40:06,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:06,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965374403] [2022-10-17 17:40:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:06,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-10-17 17:40:06,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965374403] [2022-10-17 17:40:06,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965374403] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:06,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891492631] [2022-10-17 17:40:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:06,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:06,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:06,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:06,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:40:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:40:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 17:40:06,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:06,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891492631] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:06,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:06,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-10-17 17:40:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425272831] [2022-10-17 17:40:06,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:06,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:06,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:06,876 INFO L87 Difference]: Start difference. First operand 7865 states and 11628 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:40:07,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:07,971 INFO L93 Difference]: Finished difference Result 14580 states and 21537 transitions. [2022-10-17 17:40:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:07,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-10-17 17:40:07,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:08,081 INFO L225 Difference]: With dead ends: 14580 [2022-10-17 17:40:08,082 INFO L226 Difference]: Without dead ends: 9922 [2022-10-17 17:40:08,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:08,114 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 123 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:08,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 184 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9922 states. [2022-10-17 17:40:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9922 to 9922. [2022-10-17 17:40:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 8146 states have (on average 1.40265160815124) internal successors, (11426), 8195 states have internal predecessors, (11426), 1105 states have call successors, (1105), 669 states have call predecessors, (1105), 670 states have return successors, (1583), 1058 states have call predecessors, (1583), 1105 states have call successors, (1583) [2022-10-17 17:40:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14114 transitions. [2022-10-17 17:40:09,390 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14114 transitions. Word has length 134 [2022-10-17 17:40:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:09,391 INFO L495 AbstractCegarLoop]: Abstraction has 9922 states and 14114 transitions. [2022-10-17 17:40:09,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:40:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14114 transitions. [2022-10-17 17:40:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-10-17 17:40:09,439 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:09,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:09,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:09,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 17:40:09,653 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1688469517, now seen corresponding path program 1 times [2022-10-17 17:40:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:09,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512033814] [2022-10-17 17:40:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-10-17 17:40:09,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512033814] [2022-10-17 17:40:09,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512033814] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:09,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185476239] [2022-10-17 17:40:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:09,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:09,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:09,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:09,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:40:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:10,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:40:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:40:10,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:10,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185476239] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:10,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:10,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-10-17 17:40:10,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237067580] [2022-10-17 17:40:10,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:10,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:10,127 INFO L87 Difference]: Start difference. First operand 9922 states and 14114 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:40:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:11,396 INFO L93 Difference]: Finished difference Result 18943 states and 27392 transitions. [2022-10-17 17:40:11,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-10-17 17:40:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:11,473 INFO L225 Difference]: With dead ends: 18943 [2022-10-17 17:40:11,473 INFO L226 Difference]: Without dead ends: 13845 [2022-10-17 17:40:11,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:40:11,501 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 96 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:11,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 362 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:11,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2022-10-17 17:40:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 11370. [2022-10-17 17:40:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 9482 states have (on average 1.4404134148913732) internal successors, (13658), 9531 states have internal predecessors, (13658), 1161 states have call successors, (1161), 725 states have call predecessors, (1161), 726 states have return successors, (1639), 1114 states have call predecessors, (1639), 1161 states have call successors, (1639) [2022-10-17 17:40:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 16458 transitions. [2022-10-17 17:40:12,846 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 16458 transitions. Word has length 134 [2022-10-17 17:40:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:12,847 INFO L495 AbstractCegarLoop]: Abstraction has 11370 states and 16458 transitions. [2022-10-17 17:40:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:40:12,848 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 16458 transitions. [2022-10-17 17:40:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-10-17 17:40:12,888 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:12,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:12,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:13,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:13,112 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1983233044, now seen corresponding path program 2 times [2022-10-17 17:40:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:13,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619863465] [2022-10-17 17:40:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:13,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-10-17 17:40:13,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:13,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619863465] [2022-10-17 17:40:13,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619863465] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:13,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658541334] [2022-10-17 17:40:13,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:40:13,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:13,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:13,553 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:13,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:40:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:40:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:40:13,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:40:13,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:40:13,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:13,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658541334] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:13,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:13,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:40:13,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442101741] [2022-10-17 17:40:13,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:13,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:13,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:13,791 INFO L87 Difference]: Start difference. First operand 11370 states and 16458 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:40:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:15,057 INFO L93 Difference]: Finished difference Result 22941 states and 33965 transitions. [2022-10-17 17:40:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-10-17 17:40:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:15,161 INFO L225 Difference]: With dead ends: 22941 [2022-10-17 17:40:15,162 INFO L226 Difference]: Without dead ends: 16204 [2022-10-17 17:40:15,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:15,202 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 118 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:15,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 373 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16204 states. [2022-10-17 17:40:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16204 to 15914. [2022-10-17 17:40:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15914 states, 13279 states have (on average 1.4343700579862941) internal successors, (19047), 13344 states have internal predecessors, (19047), 1615 states have call successors, (1615), 1019 states have call predecessors, (1615), 1019 states have return successors, (2520), 1551 states have call predecessors, (2520), 1615 states have call successors, (2520) [2022-10-17 17:40:17,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15914 states to 15914 states and 23182 transitions. [2022-10-17 17:40:17,037 INFO L78 Accepts]: Start accepts. Automaton has 15914 states and 23182 transitions. Word has length 134 [2022-10-17 17:40:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:17,037 INFO L495 AbstractCegarLoop]: Abstraction has 15914 states and 23182 transitions. [2022-10-17 17:40:17,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-10-17 17:40:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 15914 states and 23182 transitions. [2022-10-17 17:40:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-10-17 17:40:17,074 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:17,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:17,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:40:17,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 17:40:17,288 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:40:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:40:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1780675220, now seen corresponding path program 1 times [2022-10-17 17:40:17,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:40:17,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567817622] [2022-10-17 17:40:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:40:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-10-17 17:40:17,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:40:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567817622] [2022-10-17 17:40:17,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567817622] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:40:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083570261] [2022-10-17 17:40:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:40:17,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:40:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:40:17,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:40:17,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:40:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:40:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:40:17,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:40:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:40:17,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:40:17,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083570261] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:40:17,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:40:17,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-10-17 17:40:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694470497] [2022-10-17 17:40:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:40:17,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:40:17,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:40:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:40:17,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:17,912 INFO L87 Difference]: Start difference. First operand 15914 states and 23182 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:40:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:40:19,479 INFO L93 Difference]: Finished difference Result 25134 states and 37832 transitions. [2022-10-17 17:40:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:40:19,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2022-10-17 17:40:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:40:19,568 INFO L225 Difference]: With dead ends: 25134 [2022-10-17 17:40:19,568 INFO L226 Difference]: Without dead ends: 15972 [2022-10-17 17:40:19,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:40:19,600 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 118 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:40:19,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 361 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:40:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15972 states. [2022-10-17 17:40:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15972 to 15866. [2022-10-17 17:40:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15866 states, 13231 states have (on average 1.4153881036958658) internal successors, (18727), 13296 states have internal predecessors, (18727), 1615 states have call successors, (1615), 1019 states have call predecessors, (1615), 1019 states have return successors, (2520), 1551 states have call predecessors, (2520), 1615 states have call successors, (2520) [2022-10-17 17:40:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15866 states to 15866 states and 22862 transitions. [2022-10-17 17:40:20,863 INFO L78 Accepts]: Start accepts. Automaton has 15866 states and 22862 transitions. Word has length 135 [2022-10-17 17:40:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:40:20,864 INFO L495 AbstractCegarLoop]: Abstraction has 15866 states and 22862 transitions. [2022-10-17 17:40:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-10-17 17:40:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 15866 states and 22862 transitions. [2022-10-17 17:40:20,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-10-17 17:40:20,897 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:40:20,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:40:20,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3a988b5-8eee-4f6c-b557-44427bc772c0/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0