./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh --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 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 --- 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-2329fc7 [2022-12-14 09:13:41,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:13:41,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:13:41,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:13:41,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:13:41,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:13:41,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:13:41,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:13:41,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:13:41,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:13:41,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:13:41,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:13:41,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:13:41,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:13:41,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:13:41,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:13:41,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:13:41,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:13:41,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:13:41,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:13:41,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:13:41,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:13:41,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:13:41,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:13:41,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:13:41,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:13:41,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:13:41,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:13:41,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:13:41,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:13:41,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:13:41,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:13:41,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:13:41,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:13:41,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:13:41,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:13:41,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:13:41,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:13:41,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:13:41,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:13:41,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:13:41,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:13:41,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:13:41,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:13:41,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:13:41,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:13:41,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:13:41,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:13:41,667 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:13:41,668 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:13:41,668 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:13:41,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:13:41,668 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:13:41,668 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:13:41,668 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:13:41,669 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:13:41,669 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:13:41,669 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:13:41,669 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:13:41,669 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:13:41,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:13:41,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:13:41,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:13:41,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:13:41,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:13:41,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:13:41,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:13:41,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:13:41,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:13:41,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:13:41,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:13:41,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:13:41,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:13:41,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:13:41,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:41,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:13:41,673 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:13:41,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:13:41,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:13:41,674 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:13:41,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:13:41,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:13:41,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:13:41,674 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_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78201c5527fd684bbb5ce3426a0df19562cff65b8fe2040ac04671f6137326c6 [2022-12-14 09:13:41,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:13:41,888 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:13:41,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:13:41,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:13:41,891 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:13:41,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2022-12-14 09:13:44,468 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:13:44,664 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:13:44,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2022-12-14 09:13:44,679 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/data/ac7b29ac1/c970a3e684424d35ab9539ed953cc04f/FLAG19f93ceca [2022-12-14 09:13:45,036 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/data/ac7b29ac1/c970a3e684424d35ab9539ed953cc04f [2022-12-14 09:13:45,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:13:45,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:13:45,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:45,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:13:45,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:13:45,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec8e165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45, skipping insertion in model container [2022-12-14 09:13:45,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:13:45,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:13:45,211 WARN L237 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_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2022-12-14 09:13:45,252 WARN L237 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_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2022-12-14 09:13:45,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:45,350 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:13:45,359 WARN L237 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_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[913,926] [2022-12-14 09:13:45,373 WARN L237 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_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-2.c[5977,5990] [2022-12-14 09:13:45,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:13:45,443 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:13:45,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45 WrapperNode [2022-12-14 09:13:45,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:13:45,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:45,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:13:45,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:13:45,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,506 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 939 [2022-12-14 09:13:45,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:13:45,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:13:45,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:13:45,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:13:45,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,536 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:13:45,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:13:45,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:13:45,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:13:45,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (1/1) ... [2022-12-14 09:13:45,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:13:45,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:45,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:13:45,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:13:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:13:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 09:13:45,602 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 09:13:45,602 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-12-14 09:13:45,602 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-12-14 09:13:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 09:13:45,603 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 09:13:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 09:13:45,603 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 09:13:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 09:13:45,603 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 09:13:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 09:13:45,603 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 09:13:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 09:13:45,603 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 09:13:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:13:45,603 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 09:13:45,604 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 09:13:45,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:13:45,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:13:45,604 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 09:13:45,604 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 09:13:45,703 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:13:45,705 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:13:46,298 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:13:46,564 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:13:46,564 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-12-14 09:13:46,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:46 BoogieIcfgContainer [2022-12-14 09:13:46,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:13:46,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:13:46,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:13:46,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:13:46,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:13:45" (1/3) ... [2022-12-14 09:13:46,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4809cde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:46, skipping insertion in model container [2022-12-14 09:13:46,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:13:45" (2/3) ... [2022-12-14 09:13:46,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4809cde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:13:46, skipping insertion in model container [2022-12-14 09:13:46,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:13:46" (3/3) ... [2022-12-14 09:13:46,572 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-2.c [2022-12-14 09:13:46,587 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:13:46,587 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:13:46,624 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:13:46,629 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;@5194a4d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:13:46,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 09:13:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 217 states, 175 states have (on average 1.56) internal successors, (273), 180 states have internal predecessors, (273), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 09:13:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 09:13:46,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:46,642 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] [2022-12-14 09:13:46,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:46,646 INFO L85 PathProgramCache]: Analyzing trace with hash -739479820, now seen corresponding path program 1 times [2022-12-14 09:13:46,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:46,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60617031] [2022-12-14 09:13:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:46,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:46,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:46,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60617031] [2022-12-14 09:13:46,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60617031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:46,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:46,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941395876] [2022-12-14 09:13:46,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:46,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:46,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:46,877 INFO L87 Difference]: Start difference. First operand has 217 states, 175 states have (on average 1.56) internal successors, (273), 180 states have internal predecessors, (273), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:13:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:47,036 INFO L93 Difference]: Finished difference Result 467 states and 714 transitions. [2022-12-14 09:13:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:47,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 09:13:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:47,045 INFO L225 Difference]: With dead ends: 467 [2022-12-14 09:13:47,046 INFO L226 Difference]: Without dead ends: 250 [2022-12-14 09:13:47,049 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 [2022-12-14 09:13:47,051 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 300 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:47,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 338 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:13:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-14 09:13:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2022-12-14 09:13:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 201 states have (on average 1.492537313432836) internal successors, (300), 204 states have internal predecessors, (300), 33 states have call successors, (33), 11 states have call predecessors, (33), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-14 09:13:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 364 transitions. [2022-12-14 09:13:47,094 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 364 transitions. Word has length 28 [2022-12-14 09:13:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:47,095 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 364 transitions. [2022-12-14 09:13:47,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:13:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 364 transitions. [2022-12-14 09:13:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 09:13:47,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:47,096 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] [2022-12-14 09:13:47,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:13:47,097 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -71032627, now seen corresponding path program 1 times [2022-12-14 09:13:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:47,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409852462] [2022-12-14 09:13:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:47,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:47,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409852462] [2022-12-14 09:13:47,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409852462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:47,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:47,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:47,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824645727] [2022-12-14 09:13:47,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:47,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:47,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:47,146 INFO L87 Difference]: Start difference. First operand 246 states and 364 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:13:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:47,248 INFO L93 Difference]: Finished difference Result 402 states and 581 transitions. [2022-12-14 09:13:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-12-14 09:13:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:47,252 INFO L225 Difference]: With dead ends: 402 [2022-12-14 09:13:47,252 INFO L226 Difference]: Without dead ends: 321 [2022-12-14 09:13:47,253 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 [2022-12-14 09:13:47,253 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 298 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:47,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 323 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:13:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-12-14 09:13:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2022-12-14 09:13:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 261 states have (on average 1.4597701149425288) internal successors, (381), 264 states have internal predecessors, (381), 40 states have call successors, (40), 15 states have call predecessors, (40), 14 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 09:13:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 459 transitions. [2022-12-14 09:13:47,273 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 459 transitions. Word has length 29 [2022-12-14 09:13:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:47,273 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 459 transitions. [2022-12-14 09:13:47,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:13:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 459 transitions. [2022-12-14 09:13:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 09:13:47,274 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:47,275 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] [2022-12-14 09:13:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:13:47,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1830535461, now seen corresponding path program 1 times [2022-12-14 09:13:47,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:47,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054077332] [2022-12-14 09:13:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:47,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:47,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054077332] [2022-12-14 09:13:47,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054077332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:47,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:47,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:47,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281468741] [2022-12-14 09:13:47,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:47,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:47,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:47,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:47,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:47,313 INFO L87 Difference]: Start difference. First operand 317 states and 459 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:13:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:47,430 INFO L93 Difference]: Finished difference Result 557 states and 787 transitions. [2022-12-14 09:13:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 09:13:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:47,434 INFO L225 Difference]: With dead ends: 557 [2022-12-14 09:13:47,434 INFO L226 Difference]: Without dead ends: 405 [2022-12-14 09:13:47,435 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 [2022-12-14 09:13:47,436 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 46 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:47,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 531 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:13:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-12-14 09:13:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 391. [2022-12-14 09:13:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 324 states have (on average 1.4382716049382716) internal successors, (466), 329 states have internal predecessors, (466), 46 states have call successors, (46), 20 states have call predecessors, (46), 19 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 09:13:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 556 transitions. [2022-12-14 09:13:47,457 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 556 transitions. Word has length 30 [2022-12-14 09:13:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:47,457 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 556 transitions. [2022-12-14 09:13:47,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 09:13:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 556 transitions. [2022-12-14 09:13:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:13:47,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:47,459 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 09:13:47,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:13:47,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1089004237, now seen corresponding path program 1 times [2022-12-14 09:13:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:47,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648496527] [2022-12-14 09:13:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:47,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:13:47,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:47,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648496527] [2022-12-14 09:13:47,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648496527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:47,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:47,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:47,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41645630] [2022-12-14 09:13:47,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:47,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:47,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:47,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:47,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:47,519 INFO L87 Difference]: Start difference. First operand 391 states and 556 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:13:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:47,629 INFO L93 Difference]: Finished difference Result 554 states and 774 transitions. [2022-12-14 09:13:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-12-14 09:13:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:47,632 INFO L225 Difference]: With dead ends: 554 [2022-12-14 09:13:47,632 INFO L226 Difference]: Without dead ends: 396 [2022-12-14 09:13:47,633 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 [2022-12-14 09:13:47,634 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 32 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:47,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 563 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:13:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-12-14 09:13:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 385. [2022-12-14 09:13:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 318 states have (on average 1.421383647798742) internal successors, (452), 323 states have internal predecessors, (452), 46 states have call successors, (46), 20 states have call predecessors, (46), 19 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 09:13:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 542 transitions. [2022-12-14 09:13:47,650 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 542 transitions. Word has length 43 [2022-12-14 09:13:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:47,651 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 542 transitions. [2022-12-14 09:13:47,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:13:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 542 transitions. [2022-12-14 09:13:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 09:13:47,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:47,652 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 09:13:47,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:13:47,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash -206803555, now seen corresponding path program 1 times [2022-12-14 09:13:47,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:47,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665484614] [2022-12-14 09:13:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:47,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 09:13:47,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:47,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665484614] [2022-12-14 09:13:47,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665484614] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:47,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:47,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:13:47,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226570326] [2022-12-14 09:13:47,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:47,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:13:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:47,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:13:47,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:13:47,684 INFO L87 Difference]: Start difference. First operand 385 states and 542 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 09:13:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:47,782 INFO L93 Difference]: Finished difference Result 634 states and 866 transitions. [2022-12-14 09:13:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:13:47,783 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-12-14 09:13:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:47,784 INFO L225 Difference]: With dead ends: 634 [2022-12-14 09:13:47,785 INFO L226 Difference]: Without dead ends: 431 [2022-12-14 09:13:47,785 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 [2022-12-14 09:13:47,786 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 284 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:47,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 321 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:13:47,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-12-14 09:13:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-12-14 09:13:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 357 states have (on average 1.3865546218487395) internal successors, (495), 362 states have internal predecessors, (495), 50 states have call successors, (50), 23 states have call predecessors, (50), 22 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 09:13:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 593 transitions. [2022-12-14 09:13:47,805 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 593 transitions. Word has length 46 [2022-12-14 09:13:47,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:47,805 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 593 transitions. [2022-12-14 09:13:47,805 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 09:13:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 593 transitions. [2022-12-14 09:13:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 09:13:47,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:47,806 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 09:13:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:13:47,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1377938548, now seen corresponding path program 1 times [2022-12-14 09:13:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:47,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828277057] [2022-12-14 09:13:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:13:47,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:47,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828277057] [2022-12-14 09:13:47,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828277057] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:13:47,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:13:47,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:13:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179926826] [2022-12-14 09:13:47,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:13:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:13:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:13:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:13:47,866 INFO L87 Difference]: Start difference. First operand 431 states and 593 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:13:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:48,066 INFO L93 Difference]: Finished difference Result 471 states and 640 transitions. [2022-12-14 09:13:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:13:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-12-14 09:13:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:48,071 INFO L225 Difference]: With dead ends: 471 [2022-12-14 09:13:48,071 INFO L226 Difference]: Without dead ends: 468 [2022-12-14 09:13:48,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:13:48,072 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 520 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:48,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 319 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:13:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-12-14 09:13:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 430. [2022-12-14 09:13:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 357 states have (on average 1.380952380952381) internal successors, (493), 361 states have internal predecessors, (493), 49 states have call successors, (49), 23 states have call predecessors, (49), 22 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 09:13:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 590 transitions. [2022-12-14 09:13:48,093 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 590 transitions. Word has length 47 [2022-12-14 09:13:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:48,093 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 590 transitions. [2022-12-14 09:13:48,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:13:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 590 transitions. [2022-12-14 09:13:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 09:13:48,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:48,094 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 09:13:48,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:13:48,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:13:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:48,095 INFO L85 PathProgramCache]: Analyzing trace with hash -234824384, now seen corresponding path program 1 times [2022-12-14 09:13:48,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:48,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766015566] [2022-12-14 09:13:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:48,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:13:48,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:48,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766015566] [2022-12-14 09:13:48,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766015566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:13:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762298495] [2022-12-14 09:13:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:48,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:48,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:48,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:13:48,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:13:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:13:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:13:48,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:13:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:13:48,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762298495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:13:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420915950] [2022-12-14 09:13:48,678 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-12-14 09:13:48,679 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:13:48,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:13:48,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:13:48,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:13:51,794 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 165 for LOIs [2022-12-14 09:13:51,809 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 180 for LOIs [2022-12-14 09:13:51,826 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 376 for LOIs [2022-12-14 09:13:54,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:14:15,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8100#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 09:14:15,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:14:15,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:15,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 09:14:15,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086774795] [2022-12-14 09:14:15,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:15,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:14:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:14:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:14:15,207 INFO L87 Difference]: Start difference. First operand 430 states and 590 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 09:14:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:15,481 INFO L93 Difference]: Finished difference Result 873 states and 1158 transitions. [2022-12-14 09:14:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:14:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-12-14 09:14:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:15,486 INFO L225 Difference]: With dead ends: 873 [2022-12-14 09:14:15,486 INFO L226 Difference]: Without dead ends: 870 [2022-12-14 09:14:15,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:14:15,488 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 433 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:15,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 996 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:14:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-12-14 09:14:15,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 639. [2022-12-14 09:14:15,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 534 states have (on average 1.3595505617977528) internal successors, (726), 540 states have internal predecessors, (726), 68 states have call successors, (68), 36 states have call predecessors, (68), 35 states have return successors, (67), 63 states have call predecessors, (67), 67 states have call successors, (67) [2022-12-14 09:14:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 861 transitions. [2022-12-14 09:14:15,526 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 861 transitions. Word has length 48 [2022-12-14 09:14:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:15,526 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 861 transitions. [2022-12-14 09:14:15,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 09:14:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 861 transitions. [2022-12-14 09:14:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:14:15,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:15,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-12-14 09:14:15,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:14:15,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:15,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1978109872, now seen corresponding path program 2 times [2022-12-14 09:14:15,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:15,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888931379] [2022-12-14 09:14:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:15,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 09:14:15,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:15,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888931379] [2022-12-14 09:14:15,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888931379] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:15,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:14:15,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:14:15,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744645572] [2022-12-14 09:14:15,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:14:15,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:15,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:14:15,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:14:15,776 INFO L87 Difference]: Start difference. First operand 639 states and 861 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 09:14:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:15,863 INFO L93 Difference]: Finished difference Result 969 states and 1294 transitions. [2022-12-14 09:14:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:14:15,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-12-14 09:14:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:15,866 INFO L225 Difference]: With dead ends: 969 [2022-12-14 09:14:15,866 INFO L226 Difference]: Without dead ends: 581 [2022-12-14 09:14:15,867 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 [2022-12-14 09:14:15,867 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 297 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:15,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 334 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-12-14 09:14:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 572. [2022-12-14 09:14:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 477 states have (on average 1.3522012578616351) internal successors, (645), 484 states have internal predecessors, (645), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-12-14 09:14:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 768 transitions. [2022-12-14 09:14:15,898 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 768 transitions. Word has length 61 [2022-12-14 09:14:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:15,898 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 768 transitions. [2022-12-14 09:14:15,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 09:14:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 768 transitions. [2022-12-14 09:14:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 09:14:15,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:15,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:14:15,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:14:15,900 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:15,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:15,900 INFO L85 PathProgramCache]: Analyzing trace with hash 540554340, now seen corresponding path program 1 times [2022-12-14 09:14:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:15,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679552920] [2022-12-14 09:14:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:15,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:14:16,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679552920] [2022-12-14 09:14:16,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679552920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:16,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:14:16,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 09:14:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270204416] [2022-12-14 09:14:16,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:16,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:14:16,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:14:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:14:16,010 INFO L87 Difference]: Start difference. First operand 572 states and 768 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2022-12-14 09:14:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:16,618 INFO L93 Difference]: Finished difference Result 1340 states and 2033 transitions. [2022-12-14 09:14:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:14:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 61 [2022-12-14 09:14:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:16,622 INFO L225 Difference]: With dead ends: 1340 [2022-12-14 09:14:16,622 INFO L226 Difference]: Without dead ends: 1181 [2022-12-14 09:14:16,623 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 [2022-12-14 09:14:16,624 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 1251 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:16,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1266 Valid, 1246 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:14:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-12-14 09:14:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1170. [2022-12-14 09:14:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 974 states have (on average 1.4363449691991785) internal successors, (1399), 984 states have internal predecessors, (1399), 139 states have call successors, (139), 56 states have call predecessors, (139), 55 states have return successors, (192), 130 states have call predecessors, (192), 138 states have call successors, (192) [2022-12-14 09:14:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1730 transitions. [2022-12-14 09:14:16,684 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1730 transitions. Word has length 61 [2022-12-14 09:14:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:16,684 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 1730 transitions. [2022-12-14 09:14:16,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2022-12-14 09:14:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1730 transitions. [2022-12-14 09:14:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:14:16,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:16,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-12-14 09:14:16,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:14:16,687 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash -207395905, now seen corresponding path program 1 times [2022-12-14 09:14:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:16,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720049624] [2022-12-14 09:14:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 09:14:16,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:16,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720049624] [2022-12-14 09:14:16,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720049624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:16,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540041122] [2022-12-14 09:14:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:16,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:16,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:14:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:16,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:14:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:14:16,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:14:16,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540041122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:16,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:14:16,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 09:14:16,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127792096] [2022-12-14 09:14:16,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:16,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:14:16,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:14:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:16,953 INFO L87 Difference]: Start difference. First operand 1170 states and 1730 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 09:14:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:17,075 INFO L93 Difference]: Finished difference Result 1297 states and 1889 transitions. [2022-12-14 09:14:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:14:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-12-14 09:14:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:17,079 INFO L225 Difference]: With dead ends: 1297 [2022-12-14 09:14:17,079 INFO L226 Difference]: Without dead ends: 763 [2022-12-14 09:14:17,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:17,080 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 25 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:17,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 534 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-12-14 09:14:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 763. [2022-12-14 09:14:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 631 states have (on average 1.5166402535657686) internal successors, (957), 635 states have internal predecessors, (957), 101 states have call successors, (101), 30 states have call predecessors, (101), 30 states have return successors, (155), 98 states have call predecessors, (155), 101 states have call successors, (155) [2022-12-14 09:14:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1213 transitions. [2022-12-14 09:14:17,118 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1213 transitions. Word has length 73 [2022-12-14 09:14:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:17,118 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 1213 transitions. [2022-12-14 09:14:17,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 09:14:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1213 transitions. [2022-12-14 09:14:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:14:17,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:17,120 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, 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] [2022-12-14 09:14:17,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:14:17,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:17,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1534183974, now seen corresponding path program 1 times [2022-12-14 09:14:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:17,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847672809] [2022-12-14 09:14:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:17,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:14:17,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:17,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847672809] [2022-12-14 09:14:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847672809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895597750] [2022-12-14 09:14:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:17,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:17,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:17,417 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:17,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:14:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:14:17,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:14:17,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:14:17,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895597750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:17,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:14:17,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:14:17,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558984732] [2022-12-14 09:14:17,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:17,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:14:17,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:14:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:17,612 INFO L87 Difference]: Start difference. First operand 763 states and 1213 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2022-12-14 09:14:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:17,789 INFO L93 Difference]: Finished difference Result 2261 states and 3703 transitions. [2022-12-14 09:14:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:14:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 122 [2022-12-14 09:14:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:17,795 INFO L225 Difference]: With dead ends: 2261 [2022-12-14 09:14:17,795 INFO L226 Difference]: Without dead ends: 1504 [2022-12-14 09:14:17,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:17,798 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 205 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:17,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-12-14 09:14:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1497. [2022-12-14 09:14:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1243 states have (on average 1.5124698310539018) internal successors, (1880), 1250 states have internal predecessors, (1880), 193 states have call successors, (193), 60 states have call predecessors, (193), 60 states have return successors, (297), 187 states have call predecessors, (297), 193 states have call successors, (297) [2022-12-14 09:14:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2370 transitions. [2022-12-14 09:14:17,869 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2370 transitions. Word has length 122 [2022-12-14 09:14:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:17,869 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 2370 transitions. [2022-12-14 09:14:17,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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) [2022-12-14 09:14:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2370 transitions. [2022-12-14 09:14:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:14:17,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:17,871 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, 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] [2022-12-14 09:14:17,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 09:14:18,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:14:18,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash 729319482, now seen corresponding path program 1 times [2022-12-14 09:14:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:18,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128953366] [2022-12-14 09:14:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:18,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:14:18,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128953366] [2022-12-14 09:14:18,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128953366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335745858] [2022-12-14 09:14:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:18,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:18,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:18,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:18,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:14:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:14:18,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 09:14:18,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:14:18,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335745858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:18,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:14:18,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:14:18,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497052842] [2022-12-14 09:14:18,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:18,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:14:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:14:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:18,477 INFO L87 Difference]: Start difference. First operand 1497 states and 2370 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2022-12-14 09:14:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:18,687 INFO L93 Difference]: Finished difference Result 4448 states and 7248 transitions. [2022-12-14 09:14:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:14:18,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 122 [2022-12-14 09:14:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:18,697 INFO L225 Difference]: With dead ends: 4448 [2022-12-14 09:14:18,697 INFO L226 Difference]: Without dead ends: 2957 [2022-12-14 09:14:18,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:18,702 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 226 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:18,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-12-14 09:14:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2945. [2022-12-14 09:14:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2452 states have (on average 1.5073409461663947) internal successors, (3696), 2465 states have internal predecessors, (3696), 372 states have call successors, (372), 120 states have call predecessors, (372), 120 states have return successors, (572), 360 states have call predecessors, (572), 372 states have call successors, (572) [2022-12-14 09:14:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4640 transitions. [2022-12-14 09:14:18,849 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4640 transitions. Word has length 122 [2022-12-14 09:14:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:18,849 INFO L495 AbstractCegarLoop]: Abstraction has 2945 states and 4640 transitions. [2022-12-14 09:14:18,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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) [2022-12-14 09:14:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4640 transitions. [2022-12-14 09:14:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:14:18,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:18,854 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, 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] [2022-12-14 09:14:18,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:14:19,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 09:14:19,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1119580634, now seen corresponding path program 1 times [2022-12-14 09:14:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930212475] [2022-12-14 09:14:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:14:19,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930212475] [2022-12-14 09:14:19,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930212475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174223639] [2022-12-14 09:14:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:19,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:19,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:19,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:14:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:14:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 09:14:19,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:14:19,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174223639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:19,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:14:19,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:14:19,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001297451] [2022-12-14 09:14:19,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:19,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:14:19,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:14:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:19,438 INFO L87 Difference]: Start difference. First operand 2945 states and 4640 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-12-14 09:14:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:19,819 INFO L93 Difference]: Finished difference Result 8762 states and 14197 transitions. [2022-12-14 09:14:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:14:19,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 122 [2022-12-14 09:14:19,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:19,837 INFO L225 Difference]: With dead ends: 8762 [2022-12-14 09:14:19,837 INFO L226 Difference]: Without dead ends: 5823 [2022-12-14 09:14:19,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:19,845 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 214 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:19,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2022-12-14 09:14:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5801. [2022-12-14 09:14:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5801 states, 4840 states have (on average 1.5016528925619834) internal successors, (7268), 4865 states have internal predecessors, (7268), 720 states have call successors, (720), 240 states have call predecessors, (720), 240 states have return successors, (1104), 696 states have call predecessors, (1104), 720 states have call successors, (1104) [2022-12-14 09:14:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 9092 transitions. [2022-12-14 09:14:20,212 INFO L78 Accepts]: Start accepts. Automaton has 5801 states and 9092 transitions. Word has length 122 [2022-12-14 09:14:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:20,212 INFO L495 AbstractCegarLoop]: Abstraction has 5801 states and 9092 transitions. [2022-12-14 09:14:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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) [2022-12-14 09:14:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 5801 states and 9092 transitions. [2022-12-14 09:14:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:14:20,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:20,222 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, 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] [2022-12-14 09:14:20,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:14:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:20,423 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash 81251194, now seen corresponding path program 1 times [2022-12-14 09:14:20,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:20,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263697117] [2022-12-14 09:14:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:14:20,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263697117] [2022-12-14 09:14:20,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263697117] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280588786] [2022-12-14 09:14:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:20,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:20,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:20,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:20,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:14:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:14:20,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:14:20,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:14:20,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280588786] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:20,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:14:20,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:14:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353544292] [2022-12-14 09:14:20,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:14:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:14:20,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:20,722 INFO L87 Difference]: Start difference. First operand 5801 states and 9092 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-12-14 09:14:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:21,412 INFO L93 Difference]: Finished difference Result 17270 states and 27813 transitions. [2022-12-14 09:14:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:14:21,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 122 [2022-12-14 09:14:21,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:21,452 INFO L225 Difference]: With dead ends: 17270 [2022-12-14 09:14:21,452 INFO L226 Difference]: Without dead ends: 11475 [2022-12-14 09:14:21,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:21,468 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 220 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:21,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11475 states. [2022-12-14 09:14:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11475 to 11433. [2022-12-14 09:14:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 9556 states have (on average 1.495604855588112) internal successors, (14292), 9605 states have internal predecessors, (14292), 1396 states have call successors, (1396), 480 states have call predecessors, (1396), 480 states have return successors, (2132), 1348 states have call predecessors, (2132), 1396 states have call successors, (2132) [2022-12-14 09:14:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 17820 transitions. [2022-12-14 09:14:22,157 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 17820 transitions. Word has length 122 [2022-12-14 09:14:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:22,158 INFO L495 AbstractCegarLoop]: Abstraction has 11433 states and 17820 transitions. [2022-12-14 09:14:22,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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) [2022-12-14 09:14:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 17820 transitions. [2022-12-14 09:14:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:14:22,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:22,169 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, 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] [2022-12-14 09:14:22,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:14:22,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 09:14:22,370 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash -596480742, now seen corresponding path program 1 times [2022-12-14 09:14:22,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:22,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052976823] [2022-12-14 09:14:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:22,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:14:22,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:22,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052976823] [2022-12-14 09:14:22,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052976823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:14:22,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075900218] [2022-12-14 09:14:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:22,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:14:22,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:14:22,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:14:22,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:14:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:22,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:14:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:14:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 09:14:22,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:14:22,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075900218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:22,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:14:22,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:14:22,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647212048] [2022-12-14 09:14:22,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:14:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:14:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:22,641 INFO L87 Difference]: Start difference. First operand 11433 states and 17820 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-12-14 09:14:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:23,875 INFO L93 Difference]: Finished difference Result 34046 states and 54481 transitions. [2022-12-14 09:14:23,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:14:23,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 122 [2022-12-14 09:14:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:23,943 INFO L225 Difference]: With dead ends: 34046 [2022-12-14 09:14:23,943 INFO L226 Difference]: Without dead ends: 22619 [2022-12-14 09:14:23,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:23,973 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 208 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:23,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:14:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22619 states. [2022-12-14 09:14:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22619 to 22537. [2022-12-14 09:14:25,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22537 states, 18868 states have (on average 1.4892940428238286) internal successors, (28100), 18965 states have internal predecessors, (28100), 2708 states have call successors, (2708), 960 states have call predecessors, (2708), 960 states have return successors, (4116), 2612 states have call predecessors, (4116), 2708 states have call successors, (4116) [2022-12-14 09:14:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22537 states to 22537 states and 34924 transitions. [2022-12-14 09:14:25,099 INFO L78 Accepts]: Start accepts. Automaton has 22537 states and 34924 transitions. Word has length 122 [2022-12-14 09:14:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:25,100 INFO L495 AbstractCegarLoop]: Abstraction has 22537 states and 34924 transitions. [2022-12-14 09:14:25,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2022-12-14 09:14:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 22537 states and 34924 transitions. [2022-12-14 09:14:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:14:25,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:25,121 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, 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] [2022-12-14 09:14:25,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 09:14:25,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13de07f1-a968-4a0b-9c55-a253cd4d6d8b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 09:14:25,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:25,322 INFO L85 PathProgramCache]: Analyzing trace with hash 448429754, now seen corresponding path program 1 times [2022-12-14 09:14:25,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:25,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492333362] [2022-12-14 09:14:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:25,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:14:25,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:25,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492333362] [2022-12-14 09:14:25,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492333362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:25,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:14:25,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:14:25,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951121750] [2022-12-14 09:14:25,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:25,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:14:25,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:14:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:25,708 INFO L87 Difference]: Start difference. First operand 22537 states and 34924 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:14:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:28,912 INFO L93 Difference]: Finished difference Result 73517 states and 115679 transitions. [2022-12-14 09:14:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:14:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-12-14 09:14:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:29,087 INFO L225 Difference]: With dead ends: 73517 [2022-12-14 09:14:29,087 INFO L226 Difference]: Without dead ends: 50987 [2022-12-14 09:14:29,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:14:29,146 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 827 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:29,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 590 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:14:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50987 states. [2022-12-14 09:14:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50987 to 44105. [2022-12-14 09:14:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44105 states, 36932 states have (on average 1.4826167009639337) internal successors, (54756), 37125 states have internal predecessors, (54756), 5252 states have call successors, (5252), 1920 states have call predecessors, (5252), 1920 states have return successors, (7940), 5060 states have call predecessors, (7940), 5252 states have call successors, (7940) [2022-12-14 09:14:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44105 states to 44105 states and 67948 transitions. [2022-12-14 09:14:31,818 INFO L78 Accepts]: Start accepts. Automaton has 44105 states and 67948 transitions. Word has length 122 [2022-12-14 09:14:31,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:31,819 INFO L495 AbstractCegarLoop]: Abstraction has 44105 states and 67948 transitions. [2022-12-14 09:14:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:14:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44105 states and 67948 transitions. [2022-12-14 09:14:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 09:14:31,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:31,850 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, 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] [2022-12-14 09:14:31,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 09:14:31,850 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash 413995862, now seen corresponding path program 1 times [2022-12-14 09:14:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:31,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995332574] [2022-12-14 09:14:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:31,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:14:32,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995332574] [2022-12-14 09:14:32,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995332574] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:32,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:14:32,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:14:32,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770004738] [2022-12-14 09:14:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:32,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:14:32,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:14:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:32,094 INFO L87 Difference]: Start difference. First operand 44105 states and 67948 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:14:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:37,444 INFO L93 Difference]: Finished difference Result 123277 states and 191726 transitions. [2022-12-14 09:14:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:14:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-12-14 09:14:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:37,686 INFO L225 Difference]: With dead ends: 123277 [2022-12-14 09:14:37,686 INFO L226 Difference]: Without dead ends: 79179 [2022-12-14 09:14:37,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:14:37,784 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 786 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:37,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 880 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:14:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79179 states. [2022-12-14 09:14:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79179 to 69833. [2022-12-14 09:14:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69833 states, 58436 states have (on average 1.4753234307618592) internal successors, (86212), 58757 states have internal predecessors, (86212), 8324 states have call successors, (8324), 3072 states have call predecessors, (8324), 3072 states have return successors, (12932), 8004 states have call predecessors, (12932), 8324 states have call successors, (12932) [2022-12-14 09:14:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69833 states to 69833 states and 107468 transitions. [2022-12-14 09:14:42,958 INFO L78 Accepts]: Start accepts. Automaton has 69833 states and 107468 transitions. Word has length 123 [2022-12-14 09:14:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:42,959 INFO L495 AbstractCegarLoop]: Abstraction has 69833 states and 107468 transitions. [2022-12-14 09:14:42,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:14:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 69833 states and 107468 transitions. [2022-12-14 09:14:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 09:14:42,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:42,998 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, 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] [2022-12-14 09:14:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 09:14:42,998 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 227070778, now seen corresponding path program 1 times [2022-12-14 09:14:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713764209] [2022-12-14 09:14:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:42,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:14:43,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:43,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713764209] [2022-12-14 09:14:43,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713764209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:43,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:14:43,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:14:43,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987748932] [2022-12-14 09:14:43,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:43,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:14:43,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:14:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:43,224 INFO L87 Difference]: Start difference. First operand 69833 states and 107468 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:14:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:14:51,752 INFO L93 Difference]: Finished difference Result 190445 states and 295886 transitions. [2022-12-14 09:14:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:14:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-12-14 09:14:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:14:52,115 INFO L225 Difference]: With dead ends: 190445 [2022-12-14 09:14:52,115 INFO L226 Difference]: Without dead ends: 120619 [2022-12-14 09:14:52,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:14:52,249 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 841 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:14:52,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 658 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:14:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120619 states. [2022-12-14 09:14:59,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120619 to 103721. [2022-12-14 09:14:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103721 states, 86756 states have (on average 1.4699156254322467) internal successors, (127524), 87237 states have internal predecessors, (127524), 12356 states have call successors, (12356), 4608 states have call predecessors, (12356), 4608 states have return successors, (19156), 11876 states have call predecessors, (19156), 12356 states have call successors, (19156) [2022-12-14 09:14:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103721 states to 103721 states and 159036 transitions. [2022-12-14 09:14:59,532 INFO L78 Accepts]: Start accepts. Automaton has 103721 states and 159036 transitions. Word has length 124 [2022-12-14 09:14:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:59,533 INFO L495 AbstractCegarLoop]: Abstraction has 103721 states and 159036 transitions. [2022-12-14 09:14:59,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:14:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 103721 states and 159036 transitions. [2022-12-14 09:14:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 09:14:59,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:59,592 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, 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] [2022-12-14 09:14:59,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 09:14:59,592 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1876277798, now seen corresponding path program 1 times [2022-12-14 09:14:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:59,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844186990] [2022-12-14 09:14:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:14:59,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844186990] [2022-12-14 09:14:59,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844186990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:59,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:14:59,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:14:59,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514804727] [2022-12-14 09:14:59,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:59,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:14:59,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:14:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:59,819 INFO L87 Difference]: Start difference. First operand 103721 states and 159036 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:15:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:17,315 INFO L93 Difference]: Finished difference Result 351085 states and 545199 transitions. [2022-12-14 09:15:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:15:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-12-14 09:15:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:18,148 INFO L225 Difference]: With dead ends: 351085 [2022-12-14 09:15:18,148 INFO L226 Difference]: Without dead ends: 247371 [2022-12-14 09:15:18,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:15:18,397 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 875 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:15:18,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 620 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:15:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247371 states. [2022-12-14 09:15:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247371 to 202825. [2022-12-14 09:15:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202825 states, 169668 states have (on average 1.4624560907183441) internal successors, (248132), 170629 states have internal predecessors, (248132), 23940 states have call successors, (23940), 9216 states have call predecessors, (23940), 9216 states have return successors, (36868), 22980 states have call predecessors, (36868), 23940 states have call successors, (36868) [2022-12-14 09:15:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202825 states to 202825 states and 308940 transitions. [2022-12-14 09:15:34,801 INFO L78 Accepts]: Start accepts. Automaton has 202825 states and 308940 transitions. Word has length 125 [2022-12-14 09:15:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:15:34,802 INFO L495 AbstractCegarLoop]: Abstraction has 202825 states and 308940 transitions. [2022-12-14 09:15:34,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:15:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 202825 states and 308940 transitions. [2022-12-14 09:15:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 09:15:34,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:15:34,965 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, 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] [2022-12-14 09:15:34,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 09:15:34,966 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:15:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:15:34,966 INFO L85 PathProgramCache]: Analyzing trace with hash -319741770, now seen corresponding path program 1 times [2022-12-14 09:15:34,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:15:34,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991009798] [2022-12-14 09:15:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:15:34,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:15:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:15:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:15:35,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:15:35,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991009798] [2022-12-14 09:15:35,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991009798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:15:35,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:15:35,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:15:35,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968594829] [2022-12-14 09:15:35,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:15:35,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:15:35,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:15:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:15:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:15:35,286 INFO L87 Difference]: Start difference. First operand 202825 states and 308940 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:16:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:02,465 INFO L93 Difference]: Finished difference Result 543149 states and 836942 transitions. [2022-12-14 09:16:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:16:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-12-14 09:16:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:03,915 INFO L225 Difference]: With dead ends: 543149 [2022-12-14 09:16:03,916 INFO L226 Difference]: Without dead ends: 340331 [2022-12-14 09:16:04,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:16:04,528 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 759 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:04,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 781 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:16:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340331 states. [2022-12-14 09:16:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340331 to 301161. [2022-12-14 09:16:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301161 states, 251812 states have (on average 1.4567216812542692) internal successors, (366820), 253253 states have internal predecessors, (366820), 35524 states have call successors, (35524), 13824 states have call predecessors, (35524), 13824 states have return successors, (54580), 34084 states have call predecessors, (54580), 35524 states have call successors, (54580) [2022-12-14 09:16:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301161 states to 301161 states and 456924 transitions. [2022-12-14 09:16:30,435 INFO L78 Accepts]: Start accepts. Automaton has 301161 states and 456924 transitions. Word has length 126 [2022-12-14 09:16:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:30,436 INFO L495 AbstractCegarLoop]: Abstraction has 301161 states and 456924 transitions. [2022-12-14 09:16:30,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:16:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 301161 states and 456924 transitions. [2022-12-14 09:16:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 09:16:30,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:30,612 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, 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] [2022-12-14 09:16:30,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 09:16:30,612 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:30,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:30,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1037531042, now seen corresponding path program 1 times [2022-12-14 09:16:30,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:30,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152467416] [2022-12-14 09:16:30,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:30,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:16:30,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:30,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152467416] [2022-12-14 09:16:30,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152467416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:16:30,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:16:30,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:16:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567809602] [2022-12-14 09:16:30,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:16:30,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:16:30,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:16:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:16:30,829 INFO L87 Difference]: Start difference. First operand 301161 states and 456924 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:17:16,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:17:16,072 INFO L93 Difference]: Finished difference Result 789757 states and 1214654 transitions. [2022-12-14 09:17:16,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:17:16,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2022-12-14 09:17:16,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:17:18,159 INFO L225 Difference]: With dead ends: 789757 [2022-12-14 09:17:18,159 INFO L226 Difference]: Without dead ends: 488603 [2022-12-14 09:17:19,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:17:19,175 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 749 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:17:19,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 618 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:17:19,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488603 states. [2022-12-14 09:17:59,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488603 to 447129. [2022-12-14 09:17:59,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447129 states, 373684 states have (on average 1.4508622258378736) internal successors, (542164), 375845 states have internal predecessors, (542164), 52708 states have call successors, (52708), 20736 states have call predecessors, (52708), 20736 states have return successors, (80788), 50548 states have call predecessors, (80788), 52708 states have call successors, (80788) [2022-12-14 09:18:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447129 states to 447129 states and 675660 transitions. [2022-12-14 09:18:01,725 INFO L78 Accepts]: Start accepts. Automaton has 447129 states and 675660 transitions. Word has length 127 [2022-12-14 09:18:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:18:01,725 INFO L495 AbstractCegarLoop]: Abstraction has 447129 states and 675660 transitions. [2022-12-14 09:18:01,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:18:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 447129 states and 675660 transitions. [2022-12-14 09:18:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 09:18:02,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:18:02,097 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, 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] [2022-12-14 09:18:02,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 09:18:02,098 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:18:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:18:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1414157742, now seen corresponding path program 1 times [2022-12-14 09:18:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:18:02,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225913203] [2022-12-14 09:18:02,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:18:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:18:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:18:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:18:02,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:18:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225913203] [2022-12-14 09:18:02,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225913203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:18:02,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:18:02,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:18:02,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455781111] [2022-12-14 09:18:02,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:18:02,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:18:02,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:18:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:18:02,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:18:02,333 INFO L87 Difference]: Start difference. First operand 447129 states and 675660 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:19:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:19:37,548 INFO L93 Difference]: Finished difference Result 1417405 states and 2182911 transitions. [2022-12-14 09:19:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:19:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-12-14 09:19:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:19:42,236 INFO L225 Difference]: With dead ends: 1417405 [2022-12-14 09:19:42,236 INFO L226 Difference]: Without dead ends: 970283 [2022-12-14 09:19:43,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:19:43,768 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 746 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:19:43,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 657 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:19:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970283 states. [2022-12-14 09:21:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970283 to 873513. [2022-12-14 09:21:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873513 states, 730084 states have (on average 1.4426011253499598) internal successors, (1053220), 734405 states have internal predecessors, (1053220), 101956 states have call successors, (101956), 41472 states have call predecessors, (101956), 41472 states have return successors, (155092), 97636 states have call predecessors, (155092), 101956 states have call successors, (155092) [2022-12-14 09:21:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873513 states to 873513 states and 1310268 transitions. [2022-12-14 09:21:16,793 INFO L78 Accepts]: Start accepts. Automaton has 873513 states and 1310268 transitions. Word has length 128 [2022-12-14 09:21:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:21:16,793 INFO L495 AbstractCegarLoop]: Abstraction has 873513 states and 1310268 transitions. [2022-12-14 09:21:16,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:21:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 873513 states and 1310268 transitions. [2022-12-14 09:21:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 09:21:17,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:21:17,323 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, 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, 1] [2022-12-14 09:21:17,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 09:21:17,324 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:21:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:21:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1007076510, now seen corresponding path program 1 times [2022-12-14 09:21:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:21:17,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168150148] [2022-12-14 09:21:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:21:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:21:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:21:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:21:17,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:21:17,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168150148] [2022-12-14 09:21:17,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168150148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:21:17,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:21:17,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:21:17,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278649732] [2022-12-14 09:21:17,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:21:17,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:21:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:21:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:21:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:21:17,797 INFO L87 Difference]: Start difference. First operand 873513 states and 1310268 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)