./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/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_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/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_0942c736-859a-4b31-a4ce-c471b4436446/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 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 --- 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 12:45:31,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:45:31,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:45:31,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:45:31,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:45:31,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:45:31,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:45:31,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:45:31,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:45:31,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:45:31,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:45:31,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:45:31,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:45:31,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:45:31,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:45:31,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:45:31,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:45:31,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:45:31,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:45:31,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:45:31,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:45:31,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:45:31,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:45:31,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:45:31,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:45:31,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:45:31,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:45:31,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:45:31,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:45:31,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:45:31,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:45:31,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:45:31,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:45:31,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:45:31,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:45:31,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:45:31,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:45:31,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:45:31,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:45:31,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:45:31,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:45:31,478 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:45:31,494 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:45:31,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:45:31,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:45:31,495 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:45:31,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:45:31,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:45:31,496 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:45:31,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:45:31,501 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:45:31,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:45:31,501 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:45:31,501 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:45:31,501 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:45:31,502 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:45:31,502 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:45:31,502 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:45:31,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:45:31,502 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:45:31,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:45:31,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:45:31,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:45:31,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:45:31,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:45:31,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:45:31,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:45:31,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:45:31,504 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:45:31,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:45:31,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:45:31,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:45:31,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:45:31,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:45:31,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:45:31,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:45:31,506 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:45:31,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:45:31,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:45:31,506 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:45:31,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:45:31,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:45:31,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:45:31,507 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_0942c736-859a-4b31-a4ce-c471b4436446/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 030c097c5e5981a6b9166b6af780aa84c84c48bf3e4236dc73dc256776dad070 [2022-12-14 12:45:31,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:45:31,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:45:31,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:45:31,691 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:45:31,691 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:45:31,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2022-12-14 12:45:34,310 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:45:34,519 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:45:34,520 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2022-12-14 12:45:34,535 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/data/bba9d2656/c1febcb75c844c4a821b566b84b5c6d8/FLAG00cdc5b59 [2022-12-14 12:45:34,548 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/data/bba9d2656/c1febcb75c844c4a821b566b84b5c6d8 [2022-12-14 12:45:34,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:45:34,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:45:34,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:45:34,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:45:34,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:45:34,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c9e92f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34, skipping insertion in model container [2022-12-14 12:45:34,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:45:34,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:45:34,719 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_0942c736-859a-4b31-a4ce-c471b4436446/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2022-12-14 12:45:34,756 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_0942c736-859a-4b31-a4ce-c471b4436446/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2022-12-14 12:45:34,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:45:34,840 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:45:34,848 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_0942c736-859a-4b31-a4ce-c471b4436446/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[914,927] [2022-12-14 12:45:34,859 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_0942c736-859a-4b31-a4ce-c471b4436446/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-2.c[7115,7128] [2022-12-14 12:45:34,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:45:34,915 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:45:34,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34 WrapperNode [2022-12-14 12:45:34,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:45:34,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:45:34,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:45:34,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:45:34,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,964 INFO L138 Inliner]: procedures = 79, calls = 96, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1098 [2022-12-14 12:45:34,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:45:34,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:45:34,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:45:34,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:45:34,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:34,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:35,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:35,003 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:35,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:35,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:45:35,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:45:35,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:45:35,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:45:35,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (1/1) ... [2022-12-14 12:45:35,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:45:35,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:35,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:45:35,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:45:35,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:45:35,080 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:45:35,080 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:45:35,080 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 12:45:35,080 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 12:45:35,081 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 12:45:35,081 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 12:45:35,081 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 12:45:35,081 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 12:45:35,081 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 12:45:35,081 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 12:45:35,081 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 12:45:35,082 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 12:45:35,082 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 12:45:35,082 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 12:45:35,082 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 12:45:35,082 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 12:45:35,082 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 12:45:35,082 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 12:45:35,083 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 12:45:35,083 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 12:45:35,083 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 12:45:35,083 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 12:45:35,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:45:35,083 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 12:45:35,083 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 12:45:35,084 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 12:45:35,084 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 12:45:35,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:45:35,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:45:35,084 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 12:45:35,084 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 12:45:35,195 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:45:35,197 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:45:35,838 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:45:36,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:45:36,140 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-12-14 12:45:36,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:36 BoogieIcfgContainer [2022-12-14 12:45:36,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:45:36,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:45:36,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:45:36,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:45:36,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:45:34" (1/3) ... [2022-12-14 12:45:36,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b3c847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:36, skipping insertion in model container [2022-12-14 12:45:36,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:45:34" (2/3) ... [2022-12-14 12:45:36,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b3c847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:45:36, skipping insertion in model container [2022-12-14 12:45:36,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:45:36" (3/3) ... [2022-12-14 12:45:36,149 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-2.c [2022-12-14 12:45:36,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:45:36,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 12:45:36,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:45:36,208 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;@5e9dc6a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:45:36,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 12:45:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 271 states, 213 states have (on average 1.5446009389671362) internal successors, (329), 219 states have internal predecessors, (329), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-12-14 12:45:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:45:36,219 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:36,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:36,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash 802171097, now seen corresponding path program 1 times [2022-12-14 12:45:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093091674] [2022-12-14 12:45:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:36,446 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 12:45:36,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093091674] [2022-12-14 12:45:36,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093091674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:36,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:36,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:45:36,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30641130] [2022-12-14 12:45:36,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:36,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:45:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:45:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:45:36,478 INFO L87 Difference]: Start difference. First operand has 271 states, 213 states have (on average 1.5446009389671362) internal successors, (329), 219 states have internal predecessors, (329), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:45:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:36,880 INFO L93 Difference]: Finished difference Result 593 states and 893 transitions. [2022-12-14 12:45:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:45:36,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 12:45:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:36,890 INFO L225 Difference]: With dead ends: 593 [2022-12-14 12:45:36,890 INFO L226 Difference]: Without dead ends: 326 [2022-12-14 12:45:36,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:45:36,895 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 459 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:36,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 676 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:45:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-14 12:45:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2022-12-14 12:45:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 248 states have (on average 1.4596774193548387) internal successors, (362), 252 states have internal predecessors, (362), 49 states have call successors, (49), 21 states have call predecessors, (49), 20 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-12-14 12:45:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 458 transitions. [2022-12-14 12:45:36,966 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 458 transitions. Word has length 45 [2022-12-14 12:45:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:36,966 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 458 transitions. [2022-12-14 12:45:36,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:45:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 458 transitions. [2022-12-14 12:45:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:45:36,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:36,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:36,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:45:36,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1721145720, now seen corresponding path program 1 times [2022-12-14 12:45:36,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:36,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138160342] [2022-12-14 12:45:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:36,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:37,079 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 12:45:37,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:37,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138160342] [2022-12-14 12:45:37,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138160342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:37,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:37,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:45:37,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267941005] [2022-12-14 12:45:37,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:45:37,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:45:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:45:37,083 INFO L87 Difference]: Start difference. First operand 319 states and 458 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:45:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:37,608 INFO L93 Difference]: Finished difference Result 721 states and 961 transitions. [2022-12-14 12:45:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:45:37,608 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 12:45:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:37,613 INFO L225 Difference]: With dead ends: 721 [2022-12-14 12:45:37,613 INFO L226 Difference]: Without dead ends: 589 [2022-12-14 12:45:37,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:45:37,615 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 940 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:37,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 1189 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:45:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-12-14 12:45:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 505. [2022-12-14 12:45:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 380 states have (on average 1.3736842105263158) internal successors, (522), 385 states have internal predecessors, (522), 76 states have call successors, (76), 44 states have call predecessors, (76), 47 states have return successors, (78), 77 states have call predecessors, (78), 74 states have call successors, (78) [2022-12-14 12:45:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 676 transitions. [2022-12-14 12:45:37,655 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 676 transitions. Word has length 45 [2022-12-14 12:45:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:37,655 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 676 transitions. [2022-12-14 12:45:37,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:45:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 676 transitions. [2022-12-14 12:45:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:45:37,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:37,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:37,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:45:37,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:37,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:37,657 INFO L85 PathProgramCache]: Analyzing trace with hash -520825316, now seen corresponding path program 1 times [2022-12-14 12:45:37,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:37,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116943597] [2022-12-14 12:45:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:37,784 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 12:45:37,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116943597] [2022-12-14 12:45:37,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116943597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:37,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:37,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:45:37,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129057171] [2022-12-14 12:45:37,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:37,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:45:37,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:37,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:45:37,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:45:37,786 INFO L87 Difference]: Start difference. First operand 505 states and 676 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:45:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:38,423 INFO L93 Difference]: Finished difference Result 1021 states and 1292 transitions. [2022-12-14 12:45:38,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:45:38,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-12-14 12:45:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:38,429 INFO L225 Difference]: With dead ends: 1021 [2022-12-14 12:45:38,429 INFO L226 Difference]: Without dead ends: 719 [2022-12-14 12:45:38,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:45:38,432 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 557 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:38,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 1001 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:45:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-12-14 12:45:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 684. [2022-12-14 12:45:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 505 states have (on average 1.3346534653465347) internal successors, (674), 511 states have internal predecessors, (674), 103 states have call successors, (103), 67 states have call predecessors, (103), 74 states have return successors, (109), 107 states have call predecessors, (109), 101 states have call successors, (109) [2022-12-14 12:45:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 886 transitions. [2022-12-14 12:45:38,496 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 886 transitions. Word has length 46 [2022-12-14 12:45:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:38,496 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 886 transitions. [2022-12-14 12:45:38,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:45:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 886 transitions. [2022-12-14 12:45:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 12:45:38,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:38,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:38,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:45:38,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1716743105, now seen corresponding path program 1 times [2022-12-14 12:45:38,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:38,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152210924] [2022-12-14 12:45:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:38,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:38,556 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 12:45:38,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:38,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152210924] [2022-12-14 12:45:38,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152210924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:38,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:38,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:45:38,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037678896] [2022-12-14 12:45:38,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:38,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:45:38,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:45:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:45:38,558 INFO L87 Difference]: Start difference. First operand 684 states and 886 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:45:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:38,713 INFO L93 Difference]: Finished difference Result 1248 states and 1556 transitions. [2022-12-14 12:45:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:45:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-12-14 12:45:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:38,718 INFO L225 Difference]: With dead ends: 1248 [2022-12-14 12:45:38,718 INFO L226 Difference]: Without dead ends: 816 [2022-12-14 12:45:38,720 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 12:45:38,721 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 67 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:38,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 650 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-12-14 12:45:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 711. [2022-12-14 12:45:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 528 states have (on average 1.3238636363636365) internal successors, (699), 534 states have internal predecessors, (699), 105 states have call successors, (105), 69 states have call predecessors, (105), 76 states have return successors, (111), 109 states have call predecessors, (111), 103 states have call successors, (111) [2022-12-14 12:45:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 915 transitions. [2022-12-14 12:45:38,779 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 915 transitions. Word has length 47 [2022-12-14 12:45:38,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:38,779 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 915 transitions. [2022-12-14 12:45:38,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:45:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 915 transitions. [2022-12-14 12:45:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 12:45:38,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:38,781 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:38,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:45:38,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash 668641627, now seen corresponding path program 1 times [2022-12-14 12:45:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:38,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548515887] [2022-12-14 12:45:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:45:38,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:38,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548515887] [2022-12-14 12:45:38,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548515887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:38,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:38,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:45:38,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690928250] [2022-12-14 12:45:38,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:38,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:45:38,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:38,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:45:38,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:45:38,819 INFO L87 Difference]: Start difference. First operand 711 states and 915 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:45:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:38,935 INFO L93 Difference]: Finished difference Result 901 states and 1136 transitions. [2022-12-14 12:45:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:45:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-12-14 12:45:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:38,937 INFO L225 Difference]: With dead ends: 901 [2022-12-14 12:45:38,937 INFO L226 Difference]: Without dead ends: 628 [2022-12-14 12:45:38,938 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 12:45:38,938 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 364 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:38,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 403 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:45:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-12-14 12:45:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 519. [2022-12-14 12:45:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 388 states have (on average 1.3324742268041236) internal successors, (517), 392 states have internal predecessors, (517), 81 states have call successors, (81), 49 states have call predecessors, (81), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 12:45:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 677 transitions. [2022-12-14 12:45:38,969 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 677 transitions. Word has length 53 [2022-12-14 12:45:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:38,969 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 677 transitions. [2022-12-14 12:45:38,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:45:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 677 transitions. [2022-12-14 12:45:38,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:45:38,970 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:38,970 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:38,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:45:38,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash 572501690, now seen corresponding path program 1 times [2022-12-14 12:45:38,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:38,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530068895] [2022-12-14 12:45:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:38,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:45:39,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530068895] [2022-12-14 12:45:39,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530068895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:45:39,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:45:39,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:45:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598086688] [2022-12-14 12:45:39,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:45:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:45:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:45:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:45:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:45:39,034 INFO L87 Difference]: Start difference. First operand 519 states and 677 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 12:45:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:45:39,279 INFO L93 Difference]: Finished difference Result 622 states and 793 transitions. [2022-12-14 12:45:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:45:39,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-12-14 12:45:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:45:39,282 INFO L225 Difference]: With dead ends: 622 [2022-12-14 12:45:39,282 INFO L226 Difference]: Without dead ends: 619 [2022-12-14 12:45:39,283 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 12:45:39,284 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 661 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:45:39,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 379 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:45:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-12-14 12:45:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 518. [2022-12-14 12:45:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 388 states have (on average 1.324742268041237) internal successors, (514), 391 states have internal predecessors, (514), 80 states have call successors, (80), 49 states have call predecessors, (80), 48 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 12:45:39,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 673 transitions. [2022-12-14 12:45:39,332 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 673 transitions. Word has length 54 [2022-12-14 12:45:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:45:39,333 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 673 transitions. [2022-12-14 12:45:39,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 12:45:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 673 transitions. [2022-12-14 12:45:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 12:45:39,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:45:39,334 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:45:39,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:45:39,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:45:39,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:45:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash 566176042, now seen corresponding path program 1 times [2022-12-14 12:45:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:45:39,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052055048] [2022-12-14 12:45:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:45:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:45:39,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:45:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052055048] [2022-12-14 12:45:39,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052055048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:45:39,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358764334] [2022-12-14 12:45:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:45:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:45:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:45:39,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:45:39,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:45:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:45:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:45:39,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:45:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:45:39,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:45:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:45:39,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358764334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:45:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120240701] [2022-12-14 12:45:39,892 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 12:45:39,892 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:45:39,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:45:39,899 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:45:39,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:45:44,718 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 215 for LOIs [2022-12-14 12:45:44,748 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 183 for LOIs [2022-12-14 12:45:44,764 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 211 for LOIs [2022-12-14 12:45:44,789 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 219 for LOIs [2022-12-14 12:45:45,415 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 215 for LOIs [2022-12-14 12:45:45,495 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 215 for LOIs [2022-12-14 12:45:45,577 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 215 for LOIs [2022-12-14 12:45:45,606 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 222 for LOIs [2022-12-14 12:45:45,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:46:05,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12812#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~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_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~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) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~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)) (= ~t11_pc~0 0) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~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) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:46:05,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:46:05,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:46:05,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 12:46:05,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87878884] [2022-12-14 12:46:05,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:46:05,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:46:05,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:05,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:46:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:46:05,752 INFO L87 Difference]: Start difference. First operand 518 states and 673 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 12:46:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:06,193 INFO L93 Difference]: Finished difference Result 1091 states and 1328 transitions. [2022-12-14 12:46:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:46:06,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-12-14 12:46:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:06,198 INFO L225 Difference]: With dead ends: 1091 [2022-12-14 12:46:06,198 INFO L226 Difference]: Without dead ends: 1088 [2022-12-14 12:46:06,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:46:06,199 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 607 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:06,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 1194 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:46:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-12-14 12:46:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 813. [2022-12-14 12:46:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 593 states have (on average 1.2765598650927488) internal successors, (757), 596 states have internal predecessors, (757), 128 states have call successors, (128), 91 states have call predecessors, (128), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-14 12:46:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1012 transitions. [2022-12-14 12:46:06,254 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1012 transitions. Word has length 55 [2022-12-14 12:46:06,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:06,255 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1012 transitions. [2022-12-14 12:46:06,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-14 12:46:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1012 transitions. [2022-12-14 12:46:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 12:46:06,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:06,256 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:06,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:06,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:06,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:06,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:06,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1081014982, now seen corresponding path program 2 times [2022-12-14 12:46:06,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:06,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377412549] [2022-12-14 12:46:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:46:06,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:06,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377412549] [2022-12-14 12:46:06,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377412549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:06,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:06,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:06,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211497531] [2022-12-14 12:46:06,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:06,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:06,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:06,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:06,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:06,485 INFO L87 Difference]: Start difference. First operand 813 states and 1012 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 12:46:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:06,651 INFO L93 Difference]: Finished difference Result 1226 states and 1485 transitions. [2022-12-14 12:46:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-12-14 12:46:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:06,655 INFO L225 Difference]: With dead ends: 1226 [2022-12-14 12:46:06,655 INFO L226 Difference]: Without dead ends: 815 [2022-12-14 12:46:06,657 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 12:46:06,657 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 367 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:06,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 436 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-12-14 12:46:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 809. [2022-12-14 12:46:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 589 states have (on average 1.2648556876061121) internal successors, (745), 592 states have internal predecessors, (745), 128 states have call successors, (128), 91 states have call predecessors, (128), 90 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-12-14 12:46:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1000 transitions. [2022-12-14 12:46:06,746 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1000 transitions. Word has length 58 [2022-12-14 12:46:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:06,746 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1000 transitions. [2022-12-14 12:46:06,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 12:46:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1000 transitions. [2022-12-14 12:46:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:46:06,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:06,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:06,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:46:06,748 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1734371066, now seen corresponding path program 1 times [2022-12-14 12:46:06,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:06,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938743647] [2022-12-14 12:46:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:06,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:06,803 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 12:46:06,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:06,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938743647] [2022-12-14 12:46:06,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938743647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:06,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:06,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070765784] [2022-12-14 12:46:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:06,806 INFO L87 Difference]: Start difference. First operand 809 states and 1000 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:46:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:06,982 INFO L93 Difference]: Finished difference Result 1428 states and 1710 transitions. [2022-12-14 12:46:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-12-14 12:46:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:06,985 INFO L225 Difference]: With dead ends: 1428 [2022-12-14 12:46:06,985 INFO L226 Difference]: Without dead ends: 1065 [2022-12-14 12:46:06,986 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 12:46:06,987 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 42 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:06,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 686 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-12-14 12:46:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 884. [2022-12-14 12:46:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 650 states have (on average 1.2615384615384615) internal successors, (820), 653 states have internal predecessors, (820), 135 states have call successors, (135), 98 states have call predecessors, (135), 97 states have return successors, (134), 134 states have call predecessors, (134), 134 states have call successors, (134) [2022-12-14 12:46:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1089 transitions. [2022-12-14 12:46:07,076 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1089 transitions. Word has length 61 [2022-12-14 12:46:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:07,077 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 1089 transitions. [2022-12-14 12:46:07,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:46:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1089 transitions. [2022-12-14 12:46:07,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 12:46:07,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:07,078 INFO L195 NwaCegarLoop]: trace histogram [3, 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 12:46:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:46:07,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2036477822, now seen corresponding path program 1 times [2022-12-14 12:46:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995175601] [2022-12-14 12:46:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:46:07,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:07,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995175601] [2022-12-14 12:46:07,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995175601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:07,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:07,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:46:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459587423] [2022-12-14 12:46:07,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:07,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:46:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:46:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:46:07,192 INFO L87 Difference]: Start difference. First operand 884 states and 1089 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:46:07,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:07,860 INFO L93 Difference]: Finished difference Result 1933 states and 2272 transitions. [2022-12-14 12:46:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:46:07,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-12-14 12:46:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:07,865 INFO L225 Difference]: With dead ends: 1933 [2022-12-14 12:46:07,865 INFO L226 Difference]: Without dead ends: 1252 [2022-12-14 12:46:07,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:46:07,867 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 539 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:07,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 985 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:46:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-12-14 12:46:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1203. [2022-12-14 12:46:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 864 states have (on average 1.2222222222222223) internal successors, (1056), 867 states have internal predecessors, (1056), 191 states have call successors, (191), 147 states have call predecessors, (191), 146 states have return successors, (190), 190 states have call predecessors, (190), 190 states have call successors, (190) [2022-12-14 12:46:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1437 transitions. [2022-12-14 12:46:07,978 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1437 transitions. Word has length 70 [2022-12-14 12:46:07,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:07,978 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1437 transitions. [2022-12-14 12:46:07,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:46:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1437 transitions. [2022-12-14 12:46:07,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 12:46:07,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:07,979 INFO L195 NwaCegarLoop]: trace histogram [3, 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 12:46:07,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:46:07,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:07,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1314757526, now seen corresponding path program 1 times [2022-12-14 12:46:07,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:07,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899138701] [2022-12-14 12:46:07,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:07,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:46:08,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:08,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899138701] [2022-12-14 12:46:08,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899138701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:08,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:08,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:46:08,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973948247] [2022-12-14 12:46:08,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:08,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:46:08,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:08,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:46:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:46:08,019 INFO L87 Difference]: Start difference. First operand 1203 states and 1437 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:46:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:08,252 INFO L93 Difference]: Finished difference Result 2169 states and 2531 transitions. [2022-12-14 12:46:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:46:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-12-14 12:46:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:08,257 INFO L225 Difference]: With dead ends: 2169 [2022-12-14 12:46:08,257 INFO L226 Difference]: Without dead ends: 1379 [2022-12-14 12:46:08,259 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 12:46:08,259 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 37 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:08,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 680 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:46:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-12-14 12:46:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1250. [2022-12-14 12:46:08,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 903 states have (on average 1.2203765227021042) internal successors, (1102), 906 states have internal predecessors, (1102), 195 states have call successors, (195), 151 states have call predecessors, (195), 150 states have return successors, (194), 194 states have call predecessors, (194), 194 states have call successors, (194) [2022-12-14 12:46:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1491 transitions. [2022-12-14 12:46:08,358 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1491 transitions. Word has length 71 [2022-12-14 12:46:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:08,358 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1491 transitions. [2022-12-14 12:46:08,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:46:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1491 transitions. [2022-12-14 12:46:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 12:46:08,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:08,359 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:08,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 12:46:08,359 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:08,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 283463143, now seen corresponding path program 1 times [2022-12-14 12:46:08,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:08,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537212428] [2022-12-14 12:46:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:08,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:08,453 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 12:46:08,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:08,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537212428] [2022-12-14 12:46:08,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537212428] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:08,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:46:08,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 12:46:08,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318370630] [2022-12-14 12:46:08,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:46:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:08,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:46:08,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:46:08,455 INFO L87 Difference]: Start difference. First operand 1250 states and 1491 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 12:46:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:09,322 INFO L93 Difference]: Finished difference Result 2183 states and 3047 transitions. [2022-12-14 12:46:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:46:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 70 [2022-12-14 12:46:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:09,330 INFO L225 Difference]: With dead ends: 2183 [2022-12-14 12:46:09,330 INFO L226 Difference]: Without dead ends: 1991 [2022-12-14 12:46:09,332 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 12:46:09,332 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1545 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1563 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:09,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1563 Valid, 1532 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:46:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-12-14 12:46:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1980. [2022-12-14 12:46:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1520 states have (on average 1.3473684210526315) internal successors, (2048), 1526 states have internal predecessors, (2048), 284 states have call successors, (284), 175 states have call predecessors, (284), 174 states have return successors, (349), 280 states have call predecessors, (349), 283 states have call successors, (349) [2022-12-14 12:46:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2681 transitions. [2022-12-14 12:46:09,493 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2681 transitions. Word has length 70 [2022-12-14 12:46:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:09,493 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 2681 transitions. [2022-12-14 12:46:09,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 12:46:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2681 transitions. [2022-12-14 12:46:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 12:46:09,496 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:09,496 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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 12:46:09,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 12:46:09,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:09,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:09,497 INFO L85 PathProgramCache]: Analyzing trace with hash -218227585, now seen corresponding path program 1 times [2022-12-14 12:46:09,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:09,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754988772] [2022-12-14 12:46:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:09,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:46:09,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:09,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754988772] [2022-12-14 12:46:09,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754988772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:09,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023565524] [2022-12-14 12:46:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:09,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:09,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:09,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:09,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:46:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:09,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 12:46:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:46:09,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:09,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023565524] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:09,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:46:09,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-12-14 12:46:09,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557076244] [2022-12-14 12:46:09,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:46:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:09,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:46:09,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:46:09,883 INFO L87 Difference]: Start difference. First operand 1980 states and 2681 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:46:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:10,226 INFO L93 Difference]: Finished difference Result 2844 states and 3686 transitions. [2022-12-14 12:46:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:46:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-12-14 12:46:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:10,233 INFO L225 Difference]: With dead ends: 2844 [2022-12-14 12:46:10,233 INFO L226 Difference]: Without dead ends: 1797 [2022-12-14 12:46:10,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:46:10,235 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 361 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:10,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 1476 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:46:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-12-14 12:46:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1612. [2022-12-14 12:46:10,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1283 states have (on average 1.3858144972720188) internal successors, (1778), 1289 states have internal predecessors, (1778), 213 states have call successors, (213), 115 states have call predecessors, (213), 114 states have return successors, (278), 209 states have call predecessors, (278), 212 states have call successors, (278) [2022-12-14 12:46:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2269 transitions. [2022-12-14 12:46:10,365 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2269 transitions. Word has length 102 [2022-12-14 12:46:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:10,366 INFO L495 AbstractCegarLoop]: Abstraction has 1612 states and 2269 transitions. [2022-12-14 12:46:10,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:46:10,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2269 transitions. [2022-12-14 12:46:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 12:46:10,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:10,367 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 12:46:10,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:46:10,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:46:10,568 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:10,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1147844995, now seen corresponding path program 1 times [2022-12-14 12:46:10,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:10,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529464729] [2022-12-14 12:46:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:10,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:46:10,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:10,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529464729] [2022-12-14 12:46:10,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529464729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:10,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408420292] [2022-12-14 12:46:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:10,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:10,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:10,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:46:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:46:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:46:10,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:10,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408420292] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:10,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:46:10,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-12-14 12:46:10,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047282644] [2022-12-14 12:46:10,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:10,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:46:10,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:46:10,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:46:10,826 INFO L87 Difference]: Start difference. First operand 1612 states and 2269 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:46:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:11,124 INFO L93 Difference]: Finished difference Result 2161 states and 2894 transitions. [2022-12-14 12:46:11,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:46:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-12-14 12:46:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:11,128 INFO L225 Difference]: With dead ends: 2161 [2022-12-14 12:46:11,128 INFO L226 Difference]: Without dead ends: 1568 [2022-12-14 12:46:11,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:46:11,130 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 66 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:11,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1480 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:46:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-12-14 12:46:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1476. [2022-12-14 12:46:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1183 states have (on average 1.404057480980558) internal successors, (1661), 1189 states have internal predecessors, (1661), 194 states have call successors, (194), 98 states have call predecessors, (194), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2022-12-14 12:46:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 2114 transitions. [2022-12-14 12:46:11,282 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 2114 transitions. Word has length 112 [2022-12-14 12:46:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:11,282 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 2114 transitions. [2022-12-14 12:46:11,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-12-14 12:46:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 2114 transitions. [2022-12-14 12:46:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-14 12:46:11,284 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:11,284 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:11,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 12:46:11,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:46:11,485 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash 81011540, now seen corresponding path program 1 times [2022-12-14 12:46:11,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:11,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888417028] [2022-12-14 12:46:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:11,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 12:46:11,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:11,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888417028] [2022-12-14 12:46:11,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888417028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:11,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809723878] [2022-12-14 12:46:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:11,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:11,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:11,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:11,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:46:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:11,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:46:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:11,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:46:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809723878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:46:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:46:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-12-14 12:46:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842410543] [2022-12-14 12:46:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:46:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:46:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:46:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:46:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:46:11,752 INFO L87 Difference]: Start difference. First operand 1476 states and 2114 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 12:46:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:46:12,104 INFO L93 Difference]: Finished difference Result 2225 states and 2959 transitions. [2022-12-14 12:46:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:46:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-12-14 12:46:12,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:46:12,108 INFO L225 Difference]: With dead ends: 2225 [2022-12-14 12:46:12,108 INFO L226 Difference]: Without dead ends: 1768 [2022-12-14 12:46:12,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:46:12,110 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 347 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:46:12,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1494 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:46:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2022-12-14 12:46:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1734. [2022-12-14 12:46:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1345 states have (on average 1.3687732342007435) internal successors, (1841), 1357 states have internal predecessors, (1841), 242 states have call successors, (242), 140 states have call predecessors, (242), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2022-12-14 12:46:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2402 transitions. [2022-12-14 12:46:12,232 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2402 transitions. Word has length 113 [2022-12-14 12:46:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:46:12,232 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 2402 transitions. [2022-12-14 12:46:12,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-14 12:46:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2402 transitions. [2022-12-14 12:46:12,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 12:46:12,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:46:12,234 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:46:12,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:46:12,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:46:12,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:46:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:46:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash -127209593, now seen corresponding path program 1 times [2022-12-14 12:46:12,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:46:12,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260999324] [2022-12-14 12:46:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:12,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:46:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 12:46:12,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:46:12,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260999324] [2022-12-14 12:46:12,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260999324] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:46:12,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034135461] [2022-12-14 12:46:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:46:12,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:46:12,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:46:12,974 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:46:12,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:46:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:46:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 12:46:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:46:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:46:13,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:46:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 12:46:15,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034135461] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:46:15,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676450047] [2022-12-14 12:46:15,082 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 12:46:15,082 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:46:15,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:46:15,082 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:46:15,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:47:36,206 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-12-14 12:47:37,398 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 343 for LOIs [2022-12-14 12:47:37,542 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 334 for LOIs [2022-12-14 12:47:37,692 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-12-14 12:47:41,672 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-12-14 12:47:42,168 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 168 for LOIs [2022-12-14 12:47:42,658 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-12-14 12:47:44,294 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-12-14 12:47:45,170 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:49:05,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56555#(and (<= 0 ~t5_pc~0) (<= 0 ~t6_i~0) (<= ~t5_st~0 0) (<= 2 ~T6_E~0) (<= 0 |#NULL.base|) (<= ~T13_E~0 2) (<= ~T5_E~0 2) (<= 2 ~T4_E~0) (<= 0 ~t13_i~0) (= ~t10_i~0 0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (<= 2 ~E_13~0) (= ~t7_i~0 0) (<= 0 ~t5_st~0) (<= ~t12_i~0 0) (<= ~T6_E~0 2) (<= 2 ~T10_E~0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 2 ~E_11~0) (<= 0 ~c_dr_pc~0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (<= 0 ~t11_pc~0) (<= 0 ~t12_i~0) (<= ~T10_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= 0 ~t12_st~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= 2 ~T11_E~0) (<= ~t11_st~0 0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (<= 2 ~E_12~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t11_pc~0 0) (<= ~t7_pc~0 0) (<= 0 ~t12_pc~0) (<= 0 ~t13_st~0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 2 ~T13_E~0) (<= 0 ~t9_st~0) (<= 0 ~t10_st~0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= ~T11_E~0 2) (<= 0 ~t11_st~0) (<= ~t13_pc~0 0) (<= 0 ~t13_pc~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= ~t12_st~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t10_pc~0 0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~E_12~0 2) (<= ~t9_st~0 0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= ~E_10~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= |#NULL.base| 0) (<= 0 ~t3_st~0) (<= ~E_13~0 2) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 0 ~t10_pc~0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= 2 ~E_10~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= 0 ~t11_i~0) (<= ~t7_st~0 0) (<= 2 ~T12_E~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= ~t5_pc~0 0) (<= 2 ~E_5~0) (<= ~t6_i~0 0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t12_pc~0 0) (<= 2 ~T5_E~0) (<= ~t13_st~0 0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~E_11~0 2) (<= ~t11_i~0 0) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~t10_st~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (<= ~T12_E~0 2) (<= ~t13_i~0 0))' at error location [2022-12-14 12:49:05,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:49:05,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:49:05,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-12-14 12:49:05,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980360020] [2022-12-14 12:49:05,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:49:05,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 12:49:05,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:05,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 12:49:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=10543, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 12:49:05,631 INFO L87 Difference]: Start difference. First operand 1734 states and 2402 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 12:49:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:24,838 INFO L93 Difference]: Finished difference Result 4245 states and 5318 transitions. [2022-12-14 12:49:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-12-14 12:49:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-12-14 12:49:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:24,846 INFO L225 Difference]: With dead ends: 4245 [2022-12-14 12:49:24,846 INFO L226 Difference]: Without dead ends: 3530 [2022-12-14 12:49:24,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 287 SyntacticMatches, 6 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44229 ImplicationChecksByTransitivity, 95.7s TimeCoverageRelationStatistics Valid=10086, Invalid=99144, Unknown=0, NotChecked=0, Total=109230 [2022-12-14 12:49:24,859 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 5746 mSDsluCounter, 3714 mSDsCounter, 0 mSdLazyCounter, 9025 mSolverCounterSat, 2728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5746 SdHoareTripleChecker+Valid, 3983 SdHoareTripleChecker+Invalid, 11753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2728 IncrementalHoareTripleChecker+Valid, 9025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:24,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5746 Valid, 3983 Invalid, 11753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2728 Valid, 9025 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 12:49:24,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-12-14 12:49:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 2010. [2022-12-14 12:49:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 1529 states have (on average 1.342053629823414) internal successors, (2052), 1543 states have internal predecessors, (2052), 287 states have call successors, (287), 177 states have call predecessors, (287), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2022-12-14 12:49:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 2715 transitions. [2022-12-14 12:49:25,085 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 2715 transitions. Word has length 114 [2022-12-14 12:49:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:25,086 INFO L495 AbstractCegarLoop]: Abstraction has 2010 states and 2715 transitions. [2022-12-14 12:49:25,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-12-14 12:49:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 2715 transitions. [2022-12-14 12:49:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 12:49:25,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:25,087 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-12-14 12:49:25,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:49:25,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:49:25,289 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:25,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1755345531, now seen corresponding path program 1 times [2022-12-14 12:49:25,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:25,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874679113] [2022-12-14 12:49:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:25,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:49:25,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874679113] [2022-12-14 12:49:25,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874679113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342526995] [2022-12-14 12:49:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:25,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:25,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:25,510 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:25,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:49:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:49:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:49:25,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:49:25,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342526995] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:25,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:49:25,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-12-14 12:49:25,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210282169] [2022-12-14 12:49:25,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:49:25,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:49:25,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:49:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:49:25,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:49:25,801 INFO L87 Difference]: Start difference. First operand 2010 states and 2715 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:49:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:49:26,672 INFO L93 Difference]: Finished difference Result 3334 states and 4263 transitions. [2022-12-14 12:49:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:49:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-12-14 12:49:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:49:26,678 INFO L225 Difference]: With dead ends: 3334 [2022-12-14 12:49:26,678 INFO L226 Difference]: Without dead ends: 2343 [2022-12-14 12:49:26,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:49:26,680 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 522 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:49:26,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 937 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:49:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2022-12-14 12:49:26,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2090. [2022-12-14 12:49:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1574 states have (on average 1.3360864040660736) internal successors, (2103), 1591 states have internal predecessors, (2103), 306 states have call successors, (306), 186 states have call predecessors, (306), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2022-12-14 12:49:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 2825 transitions. [2022-12-14 12:49:26,920 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 2825 transitions. Word has length 115 [2022-12-14 12:49:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:49:26,921 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 2825 transitions. [2022-12-14 12:49:26,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:49:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 2825 transitions. [2022-12-14 12:49:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 12:49:26,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:49:26,922 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:49:26,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:49:27,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 12:49:27,124 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:49:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:49:27,125 INFO L85 PathProgramCache]: Analyzing trace with hash 271458365, now seen corresponding path program 1 times [2022-12-14 12:49:27,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:49:27,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131167065] [2022-12-14 12:49:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:27,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:49:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:49:27,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:49:27,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131167065] [2022-12-14 12:49:27,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131167065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:49:27,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034886310] [2022-12-14 12:49:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:49:27,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:49:27,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:49:27,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:49:27,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:49:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:49:27,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 12:49:27,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:49:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:49:28,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:49:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:49:29,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034886310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:49:29,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246276239] [2022-12-14 12:49:29,750 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-12-14 12:49:29,750 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:49:29,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:49:29,750 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:49:29,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:49:55,753 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 392 for LOIs [2022-12-14 12:49:56,928 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 182 for LOIs [2022-12-14 12:49:56,943 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-12-14 12:49:56,961 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 404 for LOIs [2022-12-14 12:50:01,482 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 222 for LOIs [2022-12-14 12:50:01,995 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 170 for LOIs [2022-12-14 12:50:02,501 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 396 for LOIs [2022-12-14 12:50:03,574 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 419 for LOIs [2022-12-14 12:50:04,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:51:10,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75508#(and (= ~E_12~0 2) (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~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_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~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) (<= ~p_dw_st~0 2) (= ~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) (= ~c_dr_pc~0 1) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~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)) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~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) (= ~E_M~0 2) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:51:10,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:51:10,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:51:10,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-12-14 12:51:10,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619153844] [2022-12-14 12:51:10,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:51:10,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 12:51:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 12:51:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=11246, Unknown=0, NotChecked=0, Total=12210 [2022-12-14 12:51:10,986 INFO L87 Difference]: Start difference. First operand 2090 states and 2825 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 12:51:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:23,713 INFO L93 Difference]: Finished difference Result 4374 states and 5527 transitions. [2022-12-14 12:51:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-14 12:51:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-12-14 12:51:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:23,721 INFO L225 Difference]: With dead ends: 4374 [2022-12-14 12:51:23,721 INFO L226 Difference]: Without dead ends: 3303 [2022-12-14 12:51:23,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 318 SyntacticMatches, 6 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26829 ImplicationChecksByTransitivity, 75.3s TimeCoverageRelationStatistics Valid=6762, Invalid=61620, Unknown=0, NotChecked=0, Total=68382 [2022-12-14 12:51:23,726 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 6022 mSDsluCounter, 2959 mSDsCounter, 0 mSdLazyCounter, 8980 mSolverCounterSat, 3769 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6022 SdHoareTripleChecker+Valid, 3229 SdHoareTripleChecker+Invalid, 12749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3769 IncrementalHoareTripleChecker+Valid, 8980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:23,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6022 Valid, 3229 Invalid, 12749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3769 Valid, 8980 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 12:51:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2022-12-14 12:51:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 1906. [2022-12-14 12:51:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1462 states have (on average 1.3508891928864568) internal successors, (1975), 1478 states have internal predecessors, (1975), 266 states have call successors, (266), 154 states have call predecessors, (266), 176 states have return successors, (366), 275 states have call predecessors, (366), 265 states have call successors, (366) [2022-12-14 12:51:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 2607 transitions. [2022-12-14 12:51:23,984 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 2607 transitions. Word has length 124 [2022-12-14 12:51:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:23,984 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 2607 transitions. [2022-12-14 12:51:23,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-12-14 12:51:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 2607 transitions. [2022-12-14 12:51:23,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 12:51:23,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:23,986 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-12-14 12:51:23,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 12:51:24,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:24,187 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:24,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1843576947, now seen corresponding path program 1 times [2022-12-14 12:51:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:24,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980839724] [2022-12-14 12:51:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:24,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:51:24,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:24,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980839724] [2022-12-14 12:51:24,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980839724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:24,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423978271] [2022-12-14 12:51:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:24,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:24,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:24,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:51:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 12:51:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 12:51:24,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:51:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 12:51:24,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423978271] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:24,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:51:24,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-12-14 12:51:24,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437421793] [2022-12-14 12:51:24,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:24,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:51:24,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:51:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:51:24,609 INFO L87 Difference]: Start difference. First operand 1906 states and 2607 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:51:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:25,348 INFO L93 Difference]: Finished difference Result 2561 states and 3348 transitions. [2022-12-14 12:51:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:51:25,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-12-14 12:51:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:25,353 INFO L225 Difference]: With dead ends: 2561 [2022-12-14 12:51:25,353 INFO L226 Difference]: Without dead ends: 1674 [2022-12-14 12:51:25,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-12-14 12:51:25,355 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 778 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:25,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 898 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:51:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-12-14 12:51:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1637. [2022-12-14 12:51:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1263 states have (on average 1.3697545526524149) internal successors, (1730), 1279 states have internal predecessors, (1730), 230 states have call successors, (230), 124 states have call predecessors, (230), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2022-12-14 12:51:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 2285 transitions. [2022-12-14 12:51:25,575 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 2285 transitions. Word has length 125 [2022-12-14 12:51:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:25,575 INFO L495 AbstractCegarLoop]: Abstraction has 1637 states and 2285 transitions. [2022-12-14 12:51:25,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 12:51:25,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 2285 transitions. [2022-12-14 12:51:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:51:25,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:25,577 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, 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 12:51:25,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 12:51:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:25,778 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1287900948, now seen corresponding path program 1 times [2022-12-14 12:51:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:25,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593163417] [2022-12-14 12:51:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:25,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:25,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593163417] [2022-12-14 12:51:25,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593163417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:25,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290992188] [2022-12-14 12:51:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:25,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:25,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:25,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:25,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:51:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:26,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 12:51:26,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:26,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290992188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:26,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:26,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:26,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44174942] [2022-12-14 12:51:26,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:26,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:26,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:26,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:26,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:26,049 INFO L87 Difference]: Start difference. First operand 1637 states and 2285 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 12:51:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:26,435 INFO L93 Difference]: Finished difference Result 3465 states and 5366 transitions. [2022-12-14 12:51:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:26,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 143 [2022-12-14 12:51:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:26,443 INFO L225 Difference]: With dead ends: 3465 [2022-12-14 12:51:26,443 INFO L226 Difference]: Without dead ends: 2543 [2022-12-14 12:51:26,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 12:51:26,446 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 363 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:26,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-12-14 12:51:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2536. [2022-12-14 12:51:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2025 states have (on average 1.428641975308642) internal successors, (2893), 2044 states have internal predecessors, (2893), 337 states have call successors, (337), 154 states have call predecessors, (337), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2022-12-14 12:51:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 3724 transitions. [2022-12-14 12:51:26,741 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 3724 transitions. Word has length 143 [2022-12-14 12:51:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:26,741 INFO L495 AbstractCegarLoop]: Abstraction has 2536 states and 3724 transitions. [2022-12-14 12:51:26,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 12:51:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 3724 transitions. [2022-12-14 12:51:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:51:26,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:26,744 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, 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 12:51:26,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:51:26,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:26,944 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:26,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1269979498, now seen corresponding path program 1 times [2022-12-14 12:51:26,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:26,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512517997] [2022-12-14 12:51:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:26,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:27,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512517997] [2022-12-14 12:51:27,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512517997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327432139] [2022-12-14 12:51:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:27,030 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:27,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:51:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:27,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:27,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:51:27,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:27,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327432139] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:27,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:27,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961917395] [2022-12-14 12:51:27,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:27,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:27,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:27,187 INFO L87 Difference]: Start difference. First operand 2536 states and 3724 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 12:51:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:27,734 INFO L93 Difference]: Finished difference Result 6147 states and 9784 transitions. [2022-12-14 12:51:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:27,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 143 [2022-12-14 12:51:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:27,748 INFO L225 Difference]: With dead ends: 6147 [2022-12-14 12:51:27,749 INFO L226 Difference]: Without dead ends: 4326 [2022-12-14 12:51:27,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 12:51:27,756 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 354 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:27,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-12-14 12:51:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4314. [2022-12-14 12:51:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4314 states, 3534 states have (on average 1.4683078664402942) internal successors, (5189), 3559 states have internal predecessors, (5189), 546 states have call successors, (546), 214 states have call predecessors, (546), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2022-12-14 12:51:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4314 states to 4314 states and 6558 transitions. [2022-12-14 12:51:28,225 INFO L78 Accepts]: Start accepts. Automaton has 4314 states and 6558 transitions. Word has length 143 [2022-12-14 12:51:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:28,225 INFO L495 AbstractCegarLoop]: Abstraction has 4314 states and 6558 transitions. [2022-12-14 12:51:28,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 12:51:28,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4314 states and 6558 transitions. [2022-12-14 12:51:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:51:28,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:28,229 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, 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 12:51:28,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:51:28,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:28,430 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash 283440340, now seen corresponding path program 1 times [2022-12-14 12:51:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:28,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650068890] [2022-12-14 12:51:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:28,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650068890] [2022-12-14 12:51:28,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650068890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:28,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794062968] [2022-12-14 12:51:28,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:28,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:28,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:28,502 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:28,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:51:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:28,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:51:28,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:28,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794062968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:28,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:28,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:28,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420431817] [2022-12-14 12:51:28,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:28,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:28,703 INFO L87 Difference]: Start difference. First operand 4314 states and 6558 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 12:51:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:29,589 INFO L93 Difference]: Finished difference Result 11451 states and 18479 transitions. [2022-12-14 12:51:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:29,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 143 [2022-12-14 12:51:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:29,607 INFO L225 Difference]: With dead ends: 11451 [2022-12-14 12:51:29,607 INFO L226 Difference]: Without dead ends: 7852 [2022-12-14 12:51:29,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 12:51:29,615 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 333 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:29,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2022-12-14 12:51:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7830. [2022-12-14 12:51:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7830 states, 6522 states have (on average 1.49049371358479) internal successors, (9721), 6559 states have internal predecessors, (9721), 954 states have call successors, (954), 334 states have call predecessors, (954), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2022-12-14 12:51:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7830 states to 7830 states and 12138 transitions. [2022-12-14 12:51:30,497 INFO L78 Accepts]: Start accepts. Automaton has 7830 states and 12138 transitions. Word has length 143 [2022-12-14 12:51:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:30,497 INFO L495 AbstractCegarLoop]: Abstraction has 7830 states and 12138 transitions. [2022-12-14 12:51:30,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 12:51:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 7830 states and 12138 transitions. [2022-12-14 12:51:30,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:51:30,503 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:30,503 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, 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 12:51:30,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:51:30,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:30,704 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:30,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:30,704 INFO L85 PathProgramCache]: Analyzing trace with hash -175932458, now seen corresponding path program 1 times [2022-12-14 12:51:30,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:30,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048032622] [2022-12-14 12:51:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:30,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:30,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:30,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048032622] [2022-12-14 12:51:30,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048032622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:30,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532852233] [2022-12-14 12:51:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:30,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:30,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:30,791 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:30,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:51:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:30,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 12:51:30,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:30,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532852233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:30,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:30,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:30,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868471456] [2022-12-14 12:51:30,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:30,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:30,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:30,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:30,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:30,988 INFO L87 Difference]: Start difference. First operand 7830 states and 12138 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 12:51:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:32,632 INFO L93 Difference]: Finished difference Result 21939 states and 35587 transitions. [2022-12-14 12:51:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:32,633 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 143 [2022-12-14 12:51:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:32,684 INFO L225 Difference]: With dead ends: 21939 [2022-12-14 12:51:32,684 INFO L226 Difference]: Without dead ends: 14824 [2022-12-14 12:51:32,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 12:51:32,705 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 360 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:32,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14824 states. [2022-12-14 12:51:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14824 to 14782. [2022-12-14 12:51:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14782 states, 12438 states have (on average 1.5006431902235087) internal successors, (18665), 12499 states have internal predecessors, (18665), 1750 states have call successors, (1750), 574 states have call predecessors, (1750), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2022-12-14 12:51:34,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14782 states to 14782 states and 23122 transitions. [2022-12-14 12:51:34,183 INFO L78 Accepts]: Start accepts. Automaton has 14782 states and 23122 transitions. Word has length 143 [2022-12-14 12:51:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:34,184 INFO L495 AbstractCegarLoop]: Abstraction has 14782 states and 23122 transitions. [2022-12-14 12:51:34,184 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 12:51:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 14782 states and 23122 transitions. [2022-12-14 12:51:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:51:34,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:34,199 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, 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 12:51:34,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:51:34,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 12:51:34,399 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash 984261524, now seen corresponding path program 1 times [2022-12-14 12:51:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:34,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125554899] [2022-12-14 12:51:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:34,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125554899] [2022-12-14 12:51:34,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125554899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362285160] [2022-12-14 12:51:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:34,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:34,499 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:34,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:51:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:34,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 12:51:34,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:34,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362285160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:34,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:34,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114176450] [2022-12-14 12:51:34,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:34,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:34,685 INFO L87 Difference]: Start difference. First operand 14782 states and 23122 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 12:51:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:37,806 INFO L93 Difference]: Finished difference Result 42675 states and 69239 transitions. [2022-12-14 12:51:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:37,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 143 [2022-12-14 12:51:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:37,904 INFO L225 Difference]: With dead ends: 42675 [2022-12-14 12:51:37,904 INFO L226 Difference]: Without dead ends: 28608 [2022-12-14 12:51:37,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 12:51:37,943 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 342 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:37,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28608 states. [2022-12-14 12:51:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28608 to 28526. [2022-12-14 12:51:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28526 states, 24150 states have (on average 1.5036438923395445) internal successors, (36313), 24259 states have internal predecessors, (36313), 3302 states have call successors, (3302), 1054 states have call predecessors, (3302), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2022-12-14 12:51:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28526 states to 28526 states and 44738 transitions. [2022-12-14 12:51:40,984 INFO L78 Accepts]: Start accepts. Automaton has 28526 states and 44738 transitions. Word has length 143 [2022-12-14 12:51:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:40,984 INFO L495 AbstractCegarLoop]: Abstraction has 28526 states and 44738 transitions. [2022-12-14 12:51:40,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 12:51:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 28526 states and 44738 transitions. [2022-12-14 12:51:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:51:41,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:41,011 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, 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 12:51:41,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:51:41,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 12:51:41,212 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1258741458, now seen corresponding path program 1 times [2022-12-14 12:51:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:41,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744356434] [2022-12-14 12:51:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:41,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:41,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744356434] [2022-12-14 12:51:41,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744356434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:41,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511083804] [2022-12-14 12:51:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:41,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:41,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:41,294 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:41,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:51:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:41,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:51:41,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:41,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511083804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:41,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:41,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824730376] [2022-12-14 12:51:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:41,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:41,460 INFO L87 Difference]: Start difference. First operand 28526 states and 44738 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 12:51:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:51:47,128 INFO L93 Difference]: Finished difference Result 83667 states and 135415 transitions. [2022-12-14 12:51:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:51:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 143 [2022-12-14 12:51:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:51:47,297 INFO L225 Difference]: With dead ends: 83667 [2022-12-14 12:51:47,297 INFO L226 Difference]: Without dead ends: 55856 [2022-12-14 12:51:47,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 12:51:47,375 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 348 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:51:47,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:51:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55856 states. [2022-12-14 12:51:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55856 to 55694. [2022-12-14 12:51:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55694 states, 47334 states have (on average 1.502704187264968) internal successors, (71129), 47539 states have internal predecessors, (71129), 6326 states have call successors, (6326), 2014 states have call predecessors, (6326), 2032 states have return successors, (9811), 6142 states have call predecessors, (9811), 6325 states have call successors, (9811) [2022-12-14 12:51:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55694 states to 55694 states and 87266 transitions. [2022-12-14 12:51:53,251 INFO L78 Accepts]: Start accepts. Automaton has 55694 states and 87266 transitions. Word has length 143 [2022-12-14 12:51:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:51:53,251 INFO L495 AbstractCegarLoop]: Abstraction has 55694 states and 87266 transitions. [2022-12-14 12:51:53,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 12:51:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 55694 states and 87266 transitions. [2022-12-14 12:51:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:51:53,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:51:53,290 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, 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 12:51:53,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 12:51:53,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:53,491 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:51:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:51:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2050149488, now seen corresponding path program 1 times [2022-12-14 12:51:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:51:53,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809607497] [2022-12-14 12:51:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:51:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:51:53,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:51:53,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809607497] [2022-12-14 12:51:53,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809607497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:51:53,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393395915] [2022-12-14 12:51:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:51:53,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:51:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:51:53,598 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:51:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:51:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:51:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:51:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:51:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:51:53,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:51:53,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393395915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:51:53,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:51:53,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:51:53,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366658350] [2022-12-14 12:51:53,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:51:53,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:51:53,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:51:53,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:51:53,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:51:53,823 INFO L87 Difference]: Start difference. First operand 55694 states and 87266 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 12:52:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:05,063 INFO L93 Difference]: Finished difference Result 164691 states and 265511 transitions. [2022-12-14 12:52:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:52:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 143 [2022-12-14 12:52:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:05,451 INFO L225 Difference]: With dead ends: 164691 [2022-12-14 12:52:05,451 INFO L226 Difference]: Without dead ends: 109712 [2022-12-14 12:52:05,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 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 12:52:05,569 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 339 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:05,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 586 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:52:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109712 states. [2022-12-14 12:52:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109712 to 109390. [2022-12-14 12:52:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109390 states, 93222 states have (on average 1.4996567333891142) internal successors, (139801), 93619 states have internal predecessors, (139801), 12214 states have call successors, (12214), 3934 states have call predecessors, (12214), 3952 states have return successors, (18899), 11838 states have call predecessors, (18899), 12213 states have call successors, (18899) [2022-12-14 12:52:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109390 states to 109390 states and 170914 transitions. [2022-12-14 12:52:16,226 INFO L78 Accepts]: Start accepts. Automaton has 109390 states and 170914 transitions. Word has length 143 [2022-12-14 12:52:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:52:16,226 INFO L495 AbstractCegarLoop]: Abstraction has 109390 states and 170914 transitions. [2022-12-14 12:52:16,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 12:52:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 109390 states and 170914 transitions. [2022-12-14 12:52:16,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 12:52:16,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:52:16,295 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, 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 12:52:16,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:52:16,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0942c736-859a-4b31-a4ce-c471b4436446/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 12:52:16,496 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:52:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:52:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash -822677230, now seen corresponding path program 1 times [2022-12-14 12:52:16,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:52:16,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654966753] [2022-12-14 12:52:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:52:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:52:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:52:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 12:52:16,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:52:16,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654966753] [2022-12-14 12:52:16,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654966753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:52:16,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:52:16,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:52:16,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965366208] [2022-12-14 12:52:16,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:52:16,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:52:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:52:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:52:16,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:52:16,770 INFO L87 Difference]: Start difference. First operand 109390 states and 170914 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 12:52:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:52:43,007 INFO L93 Difference]: Finished difference Result 378578 states and 595557 transitions. [2022-12-14 12:52:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:52:43,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 143 [2022-12-14 12:52:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:52:44,109 INFO L225 Difference]: With dead ends: 378578 [2022-12-14 12:52:44,109 INFO L226 Difference]: Without dead ends: 269904 [2022-12-14 12:52:44,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:52:44,424 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1217 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:52:44,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 1048 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:52:44,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269904 states. [2022-12-14 12:53:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269904 to 214222. [2022-12-14 12:53:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214222 states, 182758 states have (on average 1.4954475317085982) internal successors, (273305), 183539 states have internal predecessors, (273305), 23670 states have call successors, (23670), 7774 states have call predecessors, (23670), 7792 states have return successors, (36499), 22910 states have call predecessors, (36499), 23669 states have call successors, (36499) [2022-12-14 12:53:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214222 states to 214222 states and 333474 transitions. [2022-12-14 12:53:08,761 INFO L78 Accepts]: Start accepts. Automaton has 214222 states and 333474 transitions. Word has length 143 [2022-12-14 12:53:08,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:53:08,761 INFO L495 AbstractCegarLoop]: Abstraction has 214222 states and 333474 transitions. [2022-12-14 12:53:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 12:53:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 214222 states and 333474 transitions. [2022-12-14 12:53:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 12:53:08,906 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:53:08,906 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, 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 12:53:08,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 12:53:08,906 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:53:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:53:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1787696718, now seen corresponding path program 1 times [2022-12-14 12:53:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:53:08,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158140913] [2022-12-14 12:53:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:53:08,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:53:08,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:53:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 12:53:09,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:53:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158140913] [2022-12-14 12:53:09,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158140913] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:53:09,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:53:09,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:53:09,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638885928] [2022-12-14 12:53:09,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:53:09,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:53:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:53:09,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:53:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:53:09,151 INFO L87 Difference]: Start difference. First operand 214222 states and 333474 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 12:53:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:53:50,618 INFO L93 Difference]: Finished difference Result 583122 states and 913956 transitions. [2022-12-14 12:53:50,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:53:50,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 144 [2022-12-14 12:53:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:53:52,064 INFO L225 Difference]: With dead ends: 583122 [2022-12-14 12:53:52,064 INFO L226 Difference]: Without dead ends: 369616 [2022-12-14 12:53:52,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:53:52,545 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 1084 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:53:52,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 1161 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:53:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369616 states. [2022-12-14 12:54:29,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369616 to 318414. [2022-12-14 12:54:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318414 states, 271654 states have (on average 1.491636419857613) internal successors, (405209), 272819 states have internal predecessors, (405209), 35126 states have call successors, (35126), 11614 states have call predecessors, (35126), 11632 states have return successors, (54099), 33982 states have call predecessors, (54099), 35125 states have call successors, (54099) [2022-12-14 12:54:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318414 states to 318414 states and 494434 transitions. [2022-12-14 12:54:31,130 INFO L78 Accepts]: Start accepts. Automaton has 318414 states and 494434 transitions. Word has length 144 [2022-12-14 12:54:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:54:31,131 INFO L495 AbstractCegarLoop]: Abstraction has 318414 states and 494434 transitions. [2022-12-14 12:54:31,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 12:54:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 318414 states and 494434 transitions. [2022-12-14 12:54:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 12:54:31,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:54:31,447 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, 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 12:54:31,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 12:54:31,447 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:54:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:54:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1123520398, now seen corresponding path program 1 times [2022-12-14 12:54:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:54:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998547010] [2022-12-14 12:54:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:54:31,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:54:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:54:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 12:54:31,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:54:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998547010] [2022-12-14 12:54:31,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998547010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:54:31,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:54:31,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:54:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780593614] [2022-12-14 12:54:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:54:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:54:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:54:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:54:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:54:31,687 INFO L87 Difference]: Start difference. First operand 318414 states and 494434 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 12:55:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:55:37,517 INFO L93 Difference]: Finished difference Result 861202 states and 1348164 transitions. [2022-12-14 12:55:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:55:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 145 [2022-12-14 12:55:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:55:39,791 INFO L225 Difference]: With dead ends: 861202 [2022-12-14 12:55:39,791 INFO L226 Difference]: Without dead ends: 543504 [2022-12-14 12:55:40,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:55:40,616 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 1067 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:55:40,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1083 Valid, 1146 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:55:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543504 states. [2022-12-14 12:56:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543504 to 473422. [2022-12-14 12:56:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473422 states, 403878 states have (on average 1.4876398318304043) internal successors, (600825), 405619 states have internal predecessors, (600825), 52150 states have call successors, (52150), 17374 states have call predecessors, (52150), 17392 states have return successors, (80211), 50430 states have call predecessors, (80211), 52149 states have call successors, (80211) [2022-12-14 12:56:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473422 states to 473422 states and 733186 transitions. [2022-12-14 12:56:42,331 INFO L78 Accepts]: Start accepts. Automaton has 473422 states and 733186 transitions. Word has length 145 [2022-12-14 12:56:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:56:42,332 INFO L495 AbstractCegarLoop]: Abstraction has 473422 states and 733186 transitions. [2022-12-14 12:56:42,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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 12:56:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 473422 states and 733186 transitions. [2022-12-14 12:56:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 12:56:42,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:56:42,650 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, 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 12:56:42,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 12:56:42,650 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:56:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:56:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 573299510, now seen corresponding path program 1 times [2022-12-14 12:56:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:56:42,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605418096] [2022-12-14 12:56:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:56:42,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:56:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:56:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 12:56:43,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:56:43,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605418096] [2022-12-14 12:56:43,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605418096] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:56:43,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:56:43,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:56:43,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856333575] [2022-12-14 12:56:43,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:56:43,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:56:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:56:43,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:56:43,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:56:43,010 INFO L87 Difference]: Start difference. First operand 473422 states and 733186 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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)