./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.05.cil.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_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/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_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.05.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/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_3cc746b6-03b0-4156-8d02-00764be7d340/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 d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f --- 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 06:23:43,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:23:43,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:23:43,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:23:43,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:23:43,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:23:43,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:23:43,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:23:43,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:23:43,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:23:43,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:23:43,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:23:43,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:23:43,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:23:43,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:23:43,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:23:43,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:23:43,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:23:43,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:23:43,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:23:43,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:23:43,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:23:43,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:23:43,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:23:43,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:23:43,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:23:43,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:23:43,573 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:23:43,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:23:43,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:23:43,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:23:43,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:23:43,576 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:23:43,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:23:43,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:23:43,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:23:43,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:23:43,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:23:43,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:23:43,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:23:43,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:23:43,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:23:43,596 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:23:43,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:23:43,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:23:43,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:23:43,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:23:43,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:23:43,597 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:23:43,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:23:43,598 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:23:43,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:23:43,598 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:23:43,598 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:23:43,598 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:23:43,598 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:23:43,599 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:23:43,599 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:23:43,599 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:23:43,599 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:23:43,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:23:43,600 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:23:43,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:23:43,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:23:43,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:23:43,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:23:43,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:23:43,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:23:43,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:23:43,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:23:43,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:23:43,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:23:43,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:23:43,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:23:43,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:23:43,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:23:43,602 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:23:43,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:23:43,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:23:43,602 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:23:43,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:23:43,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:23:43,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:23:43,603 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_3cc746b6-03b0-4156-8d02-00764be7d340/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8722862ca37b1ee13dec8b9e420cd40ba7901837b8f3b6258499da6e8a2ca6f [2022-12-14 06:23:43,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:23:43,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:23:43,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:23:43,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:23:43,806 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:23:43,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/transmitter.05.cil.c [2022-12-14 06:23:46,449 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:23:46,634 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:23:46,635 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/sv-benchmarks/c/systemc/transmitter.05.cil.c [2022-12-14 06:23:46,647 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/data/6cf0eb8a5/650973f47aad4488931d2e65d425036c/FLAG768ff0c4d [2022-12-14 06:23:46,657 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/data/6cf0eb8a5/650973f47aad4488931d2e65d425036c [2022-12-14 06:23:46,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:23:46,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:23:46,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:23:46,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:23:46,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:23:46,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56293eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46, skipping insertion in model container [2022-12-14 06:23:46,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:23:46,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:23:46,791 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_3cc746b6-03b0-4156-8d02-00764be7d340/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2022-12-14 06:23:46,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:23:46,846 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:23:46,854 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_3cc746b6-03b0-4156-8d02-00764be7d340/sv-benchmarks/c/systemc/transmitter.05.cil.c[706,719] [2022-12-14 06:23:46,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:23:46,894 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:23:46,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46 WrapperNode [2022-12-14 06:23:46,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:23:46,896 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:23:46,896 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:23:46,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:23:46,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,938 INFO L138 Inliner]: procedures = 38, calls = 45, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 435 [2022-12-14 06:23:46,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:23:46,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:23:46,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:23:46,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:23:46,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,969 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:23:46,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:23:46,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:23:46,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:23:46,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (1/1) ... [2022-12-14 06:23:46,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:23:46,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:23:47,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:23:47,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:23:47,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:23:47,048 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:23:47,048 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:23:47,048 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:23:47,048 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:23:47,048 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:23:47,048 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:23:47,048 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:23:47,048 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:23:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:23:47,049 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:23:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:23:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:23:47,049 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:23:47,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:23:47,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:23:47,123 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:23:47,125 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:23:47,525 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:23:47,694 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:23:47,694 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 06:23:47,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:23:47 BoogieIcfgContainer [2022-12-14 06:23:47,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:23:47,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:23:47,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:23:47,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:23:47,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:23:46" (1/3) ... [2022-12-14 06:23:47,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c462b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:23:47, skipping insertion in model container [2022-12-14 06:23:47,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:23:46" (2/3) ... [2022-12-14 06:23:47,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c462b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:23:47, skipping insertion in model container [2022-12-14 06:23:47,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:23:47" (3/3) ... [2022-12-14 06:23:47,704 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.05.cil.c [2022-12-14 06:23:47,718 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:23:47,719 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:23:47,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:23:47,767 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;@60a19c4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:23:47,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:23:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 83 states have (on average 1.5301204819277108) internal successors, (127), 85 states have internal predecessors, (127), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 06:23:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 06:23:47,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:47,779 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] [2022-12-14 06:23:47,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash 688581264, now seen corresponding path program 1 times [2022-12-14 06:23:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:47,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523818467] [2022-12-14 06:23:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:48,120 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 06:23:48,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523818467] [2022-12-14 06:23:48,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523818467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:48,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:48,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:23:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239443204] [2022-12-14 06:23:48,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:48,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:23:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:23:48,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:23:48,156 INFO L87 Difference]: Start difference. First operand has 109 states, 83 states have (on average 1.5301204819277108) internal successors, (127), 85 states have internal predecessors, (127), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) 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, (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 06:23:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:48,383 INFO L93 Difference]: Finished difference Result 310 states and 477 transitions. [2022-12-14 06:23:48,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:23:48,385 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, (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 49 [2022-12-14 06:23:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:48,392 INFO L225 Difference]: With dead ends: 310 [2022-12-14 06:23:48,392 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 06:23:48,395 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 06:23:48,397 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 268 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:48,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 406 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 06:23:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-12-14 06:23:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 155 states have (on average 1.4451612903225806) internal successors, (224), 156 states have internal predecessors, (224), 31 states have call successors, (31), 12 states have call predecessors, (31), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-14 06:23:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 286 transitions. [2022-12-14 06:23:48,441 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 286 transitions. Word has length 49 [2022-12-14 06:23:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:48,441 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 286 transitions. [2022-12-14 06:23:48,441 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, (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 06:23:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 286 transitions. [2022-12-14 06:23:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 06:23:48,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:48,443 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] [2022-12-14 06:23:48,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:23:48,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash -268347119, now seen corresponding path program 1 times [2022-12-14 06:23:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:48,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604951534] [2022-12-14 06:23:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:48,534 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 06:23:48,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:48,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604951534] [2022-12-14 06:23:48,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604951534] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:48,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:48,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:23:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822101184] [2022-12-14 06:23:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:48,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:23:48,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:48,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:23:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:23:48,537 INFO L87 Difference]: Start difference. First operand 199 states and 286 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 06:23:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:48,890 INFO L93 Difference]: Finished difference Result 671 states and 971 transitions. [2022-12-14 06:23:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:23:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2022-12-14 06:23:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:48,895 INFO L225 Difference]: With dead ends: 671 [2022-12-14 06:23:48,895 INFO L226 Difference]: Without dead ends: 458 [2022-12-14 06:23:48,897 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 06:23:48,898 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 528 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:48,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 650 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:23:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-12-14 06:23:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 446. [2022-12-14 06:23:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 357 states have (on average 1.4397759103641457) internal successors, (514), 354 states have internal predecessors, (514), 60 states have call successors, (60), 26 states have call predecessors, (60), 28 states have return successors, (66), 66 states have call predecessors, (66), 60 states have call successors, (66) [2022-12-14 06:23:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 640 transitions. [2022-12-14 06:23:48,945 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 640 transitions. Word has length 49 [2022-12-14 06:23:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:48,946 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 640 transitions. [2022-12-14 06:23:48,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 06:23:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 640 transitions. [2022-12-14 06:23:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 06:23:48,948 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:48,948 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] [2022-12-14 06:23:48,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:23:48,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:48,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1844904878, now seen corresponding path program 1 times [2022-12-14 06:23:48,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:48,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121990276] [2022-12-14 06:23:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:48,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:49,050 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 06:23:49,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121990276] [2022-12-14 06:23:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121990276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:49,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:49,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:23:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480634624] [2022-12-14 06:23:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:23:49,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:23:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:23:49,053 INFO L87 Difference]: Start difference. First operand 446 states and 640 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 06:23:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:49,362 INFO L93 Difference]: Finished difference Result 1537 states and 2228 transitions. [2022-12-14 06:23:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:23:49,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2022-12-14 06:23:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:49,369 INFO L225 Difference]: With dead ends: 1537 [2022-12-14 06:23:49,369 INFO L226 Difference]: Without dead ends: 1061 [2022-12-14 06:23:49,371 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 06:23:49,372 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 528 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:49,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 532 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-12-14 06:23:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 833. [2022-12-14 06:23:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 668 states have (on average 1.437125748502994) internal successors, (960), 666 states have internal predecessors, (960), 108 states have call successors, (108), 50 states have call predecessors, (108), 56 states have return successors, (125), 117 states have call predecessors, (125), 108 states have call successors, (125) [2022-12-14 06:23:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1193 transitions. [2022-12-14 06:23:49,430 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1193 transitions. Word has length 49 [2022-12-14 06:23:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:49,430 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1193 transitions. [2022-12-14 06:23:49,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 06:23:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1193 transitions. [2022-12-14 06:23:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 06:23:49,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:49,431 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] [2022-12-14 06:23:49,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:23:49,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1902049103, now seen corresponding path program 1 times [2022-12-14 06:23:49,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:49,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56723853] [2022-12-14 06:23:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:49,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:49,492 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 06:23:49,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56723853] [2022-12-14 06:23:49,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56723853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:49,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:49,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:23:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628430407] [2022-12-14 06:23:49,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:49,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:23:49,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:23:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:23:49,495 INFO L87 Difference]: Start difference. First operand 833 states and 1193 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 06:23:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:49,845 INFO L93 Difference]: Finished difference Result 2824 states and 4109 transitions. [2022-12-14 06:23:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:23:49,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 49 [2022-12-14 06:23:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:49,857 INFO L225 Difference]: With dead ends: 2824 [2022-12-14 06:23:49,857 INFO L226 Difference]: Without dead ends: 1930 [2022-12-14 06:23:49,861 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 06:23:49,862 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 530 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:49,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 533 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-12-14 06:23:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1589. [2022-12-14 06:23:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1268 states have (on average 1.4290220820189274) internal successors, (1812), 1270 states have internal predecessors, (1812), 208 states have call successors, (208), 98 states have call predecessors, (208), 112 states have return successors, (249), 221 states have call predecessors, (249), 208 states have call successors, (249) [2022-12-14 06:23:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2269 transitions. [2022-12-14 06:23:49,947 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2269 transitions. Word has length 49 [2022-12-14 06:23:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:49,947 INFO L495 AbstractCegarLoop]: Abstraction has 1589 states and 2269 transitions. [2022-12-14 06:23:49,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 06:23:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2269 transitions. [2022-12-14 06:23:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 06:23:49,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:49,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:49,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:23:49,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:49,950 INFO L85 PathProgramCache]: Analyzing trace with hash -837174697, now seen corresponding path program 1 times [2022-12-14 06:23:49,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:49,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259924460] [2022-12-14 06:23:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:49,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:23:50,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259924460] [2022-12-14 06:23:50,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259924460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:50,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:50,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:23:50,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504775148] [2022-12-14 06:23:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:50,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:23:50,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:23:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:50,084 INFO L87 Difference]: Start difference. First operand 1589 states and 2269 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:50,475 INFO L93 Difference]: Finished difference Result 4762 states and 6845 transitions. [2022-12-14 06:23:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:23:50,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2022-12-14 06:23:50,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:50,492 INFO L225 Difference]: With dead ends: 4762 [2022-12-14 06:23:50,493 INFO L226 Difference]: Without dead ends: 3179 [2022-12-14 06:23:50,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:23:50,499 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 487 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:50,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 448 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:50,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2022-12-14 06:23:50,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 2635. [2022-12-14 06:23:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2126 states have (on average 1.4153339604891815) internal successors, (3009), 2129 states have internal predecessors, (3009), 316 states have call successors, (316), 164 states have call predecessors, (316), 192 states have return successors, (398), 342 states have call predecessors, (398), 316 states have call successors, (398) [2022-12-14 06:23:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3723 transitions. [2022-12-14 06:23:50,616 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3723 transitions. Word has length 64 [2022-12-14 06:23:50,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:50,617 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 3723 transitions. [2022-12-14 06:23:50,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3723 transitions. [2022-12-14 06:23:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 06:23:50,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:50,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:23:50,619 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1022672165, now seen corresponding path program 1 times [2022-12-14 06:23:50,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:50,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756826595] [2022-12-14 06:23:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:50,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:23:50,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:50,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756826595] [2022-12-14 06:23:50,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756826595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:50,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:50,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:23:50,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376208570] [2022-12-14 06:23:50,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:50,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:23:50,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:50,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:23:50,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:50,771 INFO L87 Difference]: Start difference. First operand 2635 states and 3723 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:51,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:51,273 INFO L93 Difference]: Finished difference Result 9255 states and 13148 transitions. [2022-12-14 06:23:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:23:51,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2022-12-14 06:23:51,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:51,306 INFO L225 Difference]: With dead ends: 9255 [2022-12-14 06:23:51,306 INFO L226 Difference]: Without dead ends: 6626 [2022-12-14 06:23:51,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:23:51,316 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 522 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:51,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 340 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2022-12-14 06:23:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 5108. [2022-12-14 06:23:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 4119 states have (on average 1.4039815489196408) internal successors, (5783), 4126 states have internal predecessors, (5783), 604 states have call successors, (604), 328 states have call predecessors, (604), 384 states have return successors, (754), 654 states have call predecessors, (754), 604 states have call successors, (754) [2022-12-14 06:23:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 7141 transitions. [2022-12-14 06:23:51,670 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 7141 transitions. Word has length 66 [2022-12-14 06:23:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:51,670 INFO L495 AbstractCegarLoop]: Abstraction has 5108 states and 7141 transitions. [2022-12-14 06:23:51,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 7141 transitions. [2022-12-14 06:23:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 06:23:51,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:51,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:51,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:23:51,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2022365257, now seen corresponding path program 1 times [2022-12-14 06:23:51,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:51,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532814449] [2022-12-14 06:23:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:51,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:23:51,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:51,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532814449] [2022-12-14 06:23:51,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532814449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:51,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:51,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:23:51,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301153919] [2022-12-14 06:23:51,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:51,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:23:51,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:51,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:23:51,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:51,821 INFO L87 Difference]: Start difference. First operand 5108 states and 7141 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:52,571 INFO L93 Difference]: Finished difference Result 14036 states and 19761 transitions. [2022-12-14 06:23:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:23:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 68 [2022-12-14 06:23:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:52,601 INFO L225 Difference]: With dead ends: 14036 [2022-12-14 06:23:52,601 INFO L226 Difference]: Without dead ends: 8934 [2022-12-14 06:23:52,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:23:52,612 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 432 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:52,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 443 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8934 states. [2022-12-14 06:23:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8934 to 7564. [2022-12-14 06:23:53,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7564 states, 6087 states have (on average 1.3936257598160013) internal successors, (8483), 6088 states have internal predecessors, (8483), 900 states have call successors, (900), 496 states have call predecessors, (900), 576 states have return successors, (1108), 980 states have call predecessors, (1108), 900 states have call successors, (1108) [2022-12-14 06:23:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7564 states to 7564 states and 10491 transitions. [2022-12-14 06:23:53,017 INFO L78 Accepts]: Start accepts. Automaton has 7564 states and 10491 transitions. Word has length 68 [2022-12-14 06:23:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:53,017 INFO L495 AbstractCegarLoop]: Abstraction has 7564 states and 10491 transitions. [2022-12-14 06:23:53,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7564 states and 10491 transitions. [2022-12-14 06:23:53,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 06:23:53,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:53,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:53,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:23:53,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:53,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1144787155, now seen corresponding path program 1 times [2022-12-14 06:23:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:53,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981439853] [2022-12-14 06:23:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:23:53,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:53,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981439853] [2022-12-14 06:23:53,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981439853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:53,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:53,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:23:53,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620259668] [2022-12-14 06:23:53,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:53,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:23:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:23:53,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:53,133 INFO L87 Difference]: Start difference. First operand 7564 states and 10491 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:54,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:54,272 INFO L93 Difference]: Finished difference Result 20318 states and 28385 transitions. [2022-12-14 06:23:54,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:23:54,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 70 [2022-12-14 06:23:54,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:54,330 INFO L225 Difference]: With dead ends: 20318 [2022-12-14 06:23:54,330 INFO L226 Difference]: Without dead ends: 12760 [2022-12-14 06:23:54,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:23:54,345 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 415 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:54,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 428 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12760 states. [2022-12-14 06:23:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12760 to 11254. [2022-12-14 06:23:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11254 states, 9043 states have (on average 1.382837553909101) internal successors, (12505), 9028 states have internal predecessors, (12505), 1346 states have call successors, (1346), 752 states have call predecessors, (1346), 864 states have return successors, (1630), 1474 states have call predecessors, (1630), 1346 states have call successors, (1630) [2022-12-14 06:23:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11254 states to 11254 states and 15481 transitions. [2022-12-14 06:23:55,176 INFO L78 Accepts]: Start accepts. Automaton has 11254 states and 15481 transitions. Word has length 70 [2022-12-14 06:23:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:55,177 INFO L495 AbstractCegarLoop]: Abstraction has 11254 states and 15481 transitions. [2022-12-14 06:23:55,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 11254 states and 15481 transitions. [2022-12-14 06:23:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 06:23:55,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:55,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:55,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:23:55,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2012351159, now seen corresponding path program 1 times [2022-12-14 06:23:55,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:55,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339334215] [2022-12-14 06:23:55,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:55,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:23:55,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:55,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339334215] [2022-12-14 06:23:55,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339334215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:55,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:55,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:23:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351223564] [2022-12-14 06:23:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:23:55,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:23:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:55,327 INFO L87 Difference]: Start difference. First operand 11254 states and 15481 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:56,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:56,866 INFO L93 Difference]: Finished difference Result 35514 states and 49024 transitions. [2022-12-14 06:23:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:23:56,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2022-12-14 06:23:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:56,928 INFO L225 Difference]: With dead ends: 35514 [2022-12-14 06:23:56,928 INFO L226 Difference]: Without dead ends: 24266 [2022-12-14 06:23:56,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:23:56,986 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 411 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:56,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 329 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:23:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24266 states. [2022-12-14 06:23:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24266 to 21672. [2022-12-14 06:23:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21672 states, 17425 states have (on average 1.3698134863701579) internal successors, (23869), 17410 states have internal predecessors, (23869), 2556 states have call successors, (2556), 1480 states have call predecessors, (2556), 1690 states have return successors, (3054), 2782 states have call predecessors, (3054), 2556 states have call successors, (3054) [2022-12-14 06:23:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21672 states to 21672 states and 29479 transitions. [2022-12-14 06:23:58,600 INFO L78 Accepts]: Start accepts. Automaton has 21672 states and 29479 transitions. Word has length 72 [2022-12-14 06:23:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:58,600 INFO L495 AbstractCegarLoop]: Abstraction has 21672 states and 29479 transitions. [2022-12-14 06:23:58,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:23:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 21672 states and 29479 transitions. [2022-12-14 06:23:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 06:23:58,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:58,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:58,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:23:58,606 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1550954293, now seen corresponding path program 1 times [2022-12-14 06:23:58,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:58,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849994191] [2022-12-14 06:23:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:58,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:23:58,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849994191] [2022-12-14 06:23:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849994191] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:58,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:23:58,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:23:58,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311387763] [2022-12-14 06:23:58,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:58,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:23:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:23:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:23:58,652 INFO L87 Difference]: Start difference. First operand 21672 states and 29479 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:24:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:00,125 INFO L93 Difference]: Finished difference Result 41506 states and 57162 transitions. [2022-12-14 06:24:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:00,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-12-14 06:24:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:00,202 INFO L225 Difference]: With dead ends: 41506 [2022-12-14 06:24:00,202 INFO L226 Difference]: Without dead ends: 29368 [2022-12-14 06:24:00,226 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 06:24:00,227 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 91 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:00,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 351 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29368 states. [2022-12-14 06:24:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29368 to 23946. [2022-12-14 06:24:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23946 states, 19483 states have (on average 1.3828979109993327) internal successors, (26943), 19468 states have internal predecessors, (26943), 2664 states have call successors, (2664), 1588 states have call predecessors, (2664), 1798 states have return successors, (3162), 2890 states have call predecessors, (3162), 2664 states have call successors, (3162) [2022-12-14 06:24:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23946 states to 23946 states and 32769 transitions. [2022-12-14 06:24:02,152 INFO L78 Accepts]: Start accepts. Automaton has 23946 states and 32769 transitions. Word has length 74 [2022-12-14 06:24:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:02,153 INFO L495 AbstractCegarLoop]: Abstraction has 23946 states and 32769 transitions. [2022-12-14 06:24:02,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 06:24:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 23946 states and 32769 transitions. [2022-12-14 06:24:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 06:24:02,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:02,160 INFO L195 NwaCegarLoop]: trace histogram [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 06:24:02,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:24:02,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash -746440855, now seen corresponding path program 1 times [2022-12-14 06:24:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:02,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716445522] [2022-12-14 06:24:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:02,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:24:02,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:02,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716445522] [2022-12-14 06:24:02,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716445522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:02,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:02,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:02,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745468599] [2022-12-14 06:24:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:02,197 INFO L87 Difference]: Start difference. First operand 23946 states and 32769 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:24:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:03,646 INFO L93 Difference]: Finished difference Result 41529 states and 57129 transitions. [2022-12-14 06:24:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:03,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2022-12-14 06:24:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:03,706 INFO L225 Difference]: With dead ends: 41529 [2022-12-14 06:24:03,706 INFO L226 Difference]: Without dead ends: 25612 [2022-12-14 06:24:03,727 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 06:24:03,728 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 118 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:03,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 261 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2022-12-14 06:24:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 23062. [2022-12-14 06:24:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23062 states, 18767 states have (on average 1.3742739915809665) internal successors, (25791), 18720 states have internal predecessors, (25791), 2640 states have call successors, (2640), 1580 states have call predecessors, (2640), 1654 states have return successors, (2810), 2762 states have call predecessors, (2810), 2640 states have call successors, (2810) [2022-12-14 06:24:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23062 states to 23062 states and 31241 transitions. [2022-12-14 06:24:05,083 INFO L78 Accepts]: Start accepts. Automaton has 23062 states and 31241 transitions. Word has length 83 [2022-12-14 06:24:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:05,083 INFO L495 AbstractCegarLoop]: Abstraction has 23062 states and 31241 transitions. [2022-12-14 06:24:05,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:24:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 23062 states and 31241 transitions. [2022-12-14 06:24:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 06:24:05,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:05,098 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:24:05,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:24:05,098 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1931297875, now seen corresponding path program 1 times [2022-12-14 06:24:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:05,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946965110] [2022-12-14 06:24:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:05,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 06:24:05,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:05,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946965110] [2022-12-14 06:24:05,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946965110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:05,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:05,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720518885] [2022-12-14 06:24:05,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:05,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:05,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:05,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:05,139 INFO L87 Difference]: Start difference. First operand 23062 states and 31241 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:24:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:07,656 INFO L93 Difference]: Finished difference Result 57507 states and 78300 transitions. [2022-12-14 06:24:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 103 [2022-12-14 06:24:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:07,731 INFO L225 Difference]: With dead ends: 57507 [2022-12-14 06:24:07,731 INFO L226 Difference]: Without dead ends: 34450 [2022-12-14 06:24:07,770 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 06:24:07,770 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 115 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:07,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 257 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34450 states. [2022-12-14 06:24:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34450 to 34268. [2022-12-14 06:24:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34268 states, 27909 states have (on average 1.3596689240030098) internal successors, (37947), 27844 states have internal predecessors, (37947), 3892 states have call successors, (3892), 2358 states have call predecessors, (3892), 2466 states have return successors, (4134), 4066 states have call predecessors, (4134), 3892 states have call successors, (4134) [2022-12-14 06:24:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34268 states to 34268 states and 45973 transitions. [2022-12-14 06:24:09,827 INFO L78 Accepts]: Start accepts. Automaton has 34268 states and 45973 transitions. Word has length 103 [2022-12-14 06:24:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:09,827 INFO L495 AbstractCegarLoop]: Abstraction has 34268 states and 45973 transitions. [2022-12-14 06:24:09,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:24:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 34268 states and 45973 transitions. [2022-12-14 06:24:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 06:24:09,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:09,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:24:09,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:24:09,842 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:09,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:09,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1289813174, now seen corresponding path program 1 times [2022-12-14 06:24:09,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:09,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713904786] [2022-12-14 06:24:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:24:09,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713904786] [2022-12-14 06:24:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713904786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886130779] [2022-12-14 06:24:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:09,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:09,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:09,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:24:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:24:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:24:10,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:10,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886130779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:10,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:10,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:24:10,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594667540] [2022-12-14 06:24:10,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:10,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:10,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:10,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:10,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:10,075 INFO L87 Difference]: Start difference. First operand 34268 states and 45973 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:24:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:12,494 INFO L93 Difference]: Finished difference Result 65562 states and 88933 transitions. [2022-12-14 06:24:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2022-12-14 06:24:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:12,578 INFO L225 Difference]: With dead ends: 65562 [2022-12-14 06:24:12,579 INFO L226 Difference]: Without dead ends: 42506 [2022-12-14 06:24:12,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:12,617 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 82 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:12,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 343 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:12,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42506 states. [2022-12-14 06:24:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42506 to 38132. [2022-12-14 06:24:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38132 states, 31417 states have (on average 1.3746379348760225) internal successors, (43187), 31352 states have internal predecessors, (43187), 4070 states have call successors, (4070), 2536 states have call predecessors, (4070), 2644 states have return successors, (4312), 4244 states have call predecessors, (4312), 4070 states have call successors, (4312) [2022-12-14 06:24:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38132 states to 38132 states and 51569 transitions. [2022-12-14 06:24:14,884 INFO L78 Accepts]: Start accepts. Automaton has 38132 states and 51569 transitions. Word has length 105 [2022-12-14 06:24:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:14,884 INFO L495 AbstractCegarLoop]: Abstraction has 38132 states and 51569 transitions. [2022-12-14 06:24:14,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:24:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 38132 states and 51569 transitions. [2022-12-14 06:24:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 06:24:14,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:14,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:24:14,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:24:15,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:15,099 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1132697109, now seen corresponding path program 1 times [2022-12-14 06:24:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:15,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583696498] [2022-12-14 06:24:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:24:15,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:15,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583696498] [2022-12-14 06:24:15,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583696498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:15,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322806268] [2022-12-14 06:24:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:15,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:15,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:15,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:24:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:24:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:24:15,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:15,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322806268] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:15,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:15,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:24:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167014170] [2022-12-14 06:24:15,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:15,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:15,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:15,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:15,336 INFO L87 Difference]: Start difference. First operand 38132 states and 51569 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:24:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:18,276 INFO L93 Difference]: Finished difference Result 72898 states and 99323 transitions. [2022-12-14 06:24:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:18,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2022-12-14 06:24:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:18,359 INFO L225 Difference]: With dead ends: 72898 [2022-12-14 06:24:18,359 INFO L226 Difference]: Without dead ends: 47102 [2022-12-14 06:24:18,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:18,388 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 76 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:18,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 338 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47102 states. [2022-12-14 06:24:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47102 to 43360. [2022-12-14 06:24:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43360 states, 36149 states have (on average 1.3866220365708595) internal successors, (50125), 36084 states have internal predecessors, (50125), 4318 states have call successors, (4318), 2784 states have call predecessors, (4318), 2892 states have return successors, (4560), 4492 states have call predecessors, (4560), 4318 states have call successors, (4560) [2022-12-14 06:24:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43360 states to 43360 states and 59003 transitions. [2022-12-14 06:24:20,830 INFO L78 Accepts]: Start accepts. Automaton has 43360 states and 59003 transitions. Word has length 105 [2022-12-14 06:24:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:20,830 INFO L495 AbstractCegarLoop]: Abstraction has 43360 states and 59003 transitions. [2022-12-14 06:24:20,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:24:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 43360 states and 59003 transitions. [2022-12-14 06:24:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-12-14 06:24:20,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:20,844 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:24:20,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:24:21,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:24:21,046 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1518393736, now seen corresponding path program 1 times [2022-12-14 06:24:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104917161] [2022-12-14 06:24:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:21,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:24:21,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:21,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104917161] [2022-12-14 06:24:21,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104917161] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:24:21,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773676899] [2022-12-14 06:24:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:21,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:24:21,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:24:21,138 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:24:21,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:24:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:24:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:24:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:24:21,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:24:21,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773676899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:21,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:24:21,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:24:21,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586104488] [2022-12-14 06:24:21,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:21,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:21,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:21,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:21,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:21,251 INFO L87 Difference]: Start difference. First operand 43360 states and 59003 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:24:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:24,067 INFO L93 Difference]: Finished difference Result 82526 states and 112987 transitions. [2022-12-14 06:24:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:24,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2022-12-14 06:24:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:24,178 INFO L225 Difference]: With dead ends: 82526 [2022-12-14 06:24:24,178 INFO L226 Difference]: Without dead ends: 53122 [2022-12-14 06:24:24,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:24:24,226 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 70 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:24,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 333 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53122 states. [2022-12-14 06:24:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53122 to 49992. [2022-12-14 06:24:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49992 states, 42141 states have (on average 1.3956242139484112) internal successors, (58813), 42076 states have internal predecessors, (58813), 4638 states have call successors, (4638), 3104 states have call predecessors, (4638), 3212 states have return successors, (4880), 4812 states have call predecessors, (4880), 4638 states have call successors, (4880) [2022-12-14 06:24:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49992 states to 49992 states and 68331 transitions. [2022-12-14 06:24:27,102 INFO L78 Accepts]: Start accepts. Automaton has 49992 states and 68331 transitions. Word has length 105 [2022-12-14 06:24:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:27,102 INFO L495 AbstractCegarLoop]: Abstraction has 49992 states and 68331 transitions. [2022-12-14 06:24:27,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:24:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 49992 states and 68331 transitions. [2022-12-14 06:24:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-14 06:24:27,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:27,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 06:24:27,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:24:27,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:24:27,314 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1514968966, now seen corresponding path program 1 times [2022-12-14 06:24:27,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:27,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870024851] [2022-12-14 06:24:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:27,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:24:27,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:27,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870024851] [2022-12-14 06:24:27,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870024851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:27,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:27,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:24:27,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142125324] [2022-12-14 06:24:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:27,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:24:27,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:24:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:24:27,388 INFO L87 Difference]: Start difference. First operand 49992 states and 68331 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:24:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:31,270 INFO L93 Difference]: Finished difference Result 125143 states and 171514 transitions. [2022-12-14 06:24:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:24:31,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 102 [2022-12-14 06:24:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:31,421 INFO L225 Difference]: With dead ends: 125143 [2022-12-14 06:24:31,421 INFO L226 Difference]: Without dead ends: 75156 [2022-12-14 06:24:31,487 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 06:24:31,487 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 118 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:31,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:24:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75156 states. [2022-12-14 06:24:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75156 to 74512. [2022-12-14 06:24:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74512 states, 62873 states have (on average 1.3812129212857664) internal successors, (86841), 62784 states have internal predecessors, (86841), 6850 states have call successors, (6850), 4632 states have call predecessors, (6850), 4788 states have return successors, (7192), 7096 states have call predecessors, (7192), 6850 states have call successors, (7192) [2022-12-14 06:24:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74512 states to 74512 states and 100883 transitions. [2022-12-14 06:24:35,966 INFO L78 Accepts]: Start accepts. Automaton has 74512 states and 100883 transitions. Word has length 102 [2022-12-14 06:24:35,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:35,966 INFO L495 AbstractCegarLoop]: Abstraction has 74512 states and 100883 transitions. [2022-12-14 06:24:35,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:24:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 74512 states and 100883 transitions. [2022-12-14 06:24:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 06:24:35,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:35,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:24:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 06:24:35,982 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 912229195, now seen corresponding path program 1 times [2022-12-14 06:24:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852953591] [2022-12-14 06:24:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 06:24:36,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852953591] [2022-12-14 06:24:36,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852953591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:36,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:36,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:24:36,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065436462] [2022-12-14 06:24:36,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:36,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:24:36,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:36,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:24:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:24:36,299 INFO L87 Difference]: Start difference. First operand 74512 states and 100883 transitions. Second operand has 11 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:24:47,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:24:47,426 INFO L93 Difference]: Finished difference Result 222996 states and 310293 transitions. [2022-12-14 06:24:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:24:47,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 103 [2022-12-14 06:24:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:24:47,840 INFO L225 Difference]: With dead ends: 222996 [2022-12-14 06:24:47,840 INFO L226 Difference]: Without dead ends: 176144 [2022-12-14 06:24:47,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:24:47,911 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1328 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:24:47,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1346 Valid, 427 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:24:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176144 states. [2022-12-14 06:24:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176144 to 142038. [2022-12-14 06:24:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142038 states, 121729 states have (on average 1.376738492881729) internal successors, (167589), 121820 states have internal predecessors, (167589), 11386 states have call successors, (11386), 8520 states have call predecessors, (11386), 8922 states have return successors, (12291), 11698 states have call predecessors, (12291), 11386 states have call successors, (12291) [2022-12-14 06:24:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142038 states to 142038 states and 191266 transitions. [2022-12-14 06:24:59,277 INFO L78 Accepts]: Start accepts. Automaton has 142038 states and 191266 transitions. Word has length 103 [2022-12-14 06:24:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:24:59,277 INFO L495 AbstractCegarLoop]: Abstraction has 142038 states and 191266 transitions. [2022-12-14 06:24:59,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:24:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 142038 states and 191266 transitions. [2022-12-14 06:24:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 06:24:59,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:24:59,293 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, 1, 1, 1, 1, 1, 1, 1, 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 06:24:59,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 06:24:59,294 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:24:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:24:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash 798842538, now seen corresponding path program 1 times [2022-12-14 06:24:59,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:24:59,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107222341] [2022-12-14 06:24:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:24:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:24:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:24:59,329 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 06:24:59,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:24:59,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107222341] [2022-12-14 06:24:59,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107222341] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:24:59,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:24:59,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:24:59,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056421200] [2022-12-14 06:24:59,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:24:59,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:24:59,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:24:59,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:24:59,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:24:59,331 INFO L87 Difference]: Start difference. First operand 142038 states and 191266 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:25:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:09,740 INFO L93 Difference]: Finished difference Result 228531 states and 312264 transitions. [2022-12-14 06:25:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:25:09,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 103 [2022-12-14 06:25:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:10,026 INFO L225 Difference]: With dead ends: 228531 [2022-12-14 06:25:10,026 INFO L226 Difference]: Without dead ends: 141483 [2022-12-14 06:25:10,119 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 06:25:10,120 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 274 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:10,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 406 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:25:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141483 states. [2022-12-14 06:25:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141483 to 139467. [2022-12-14 06:25:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139467 states, 119269 states have (on average 1.3580980808089278) internal successors, (161979), 119249 states have internal predecessors, (161979), 11386 states have call successors, (11386), 8520 states have call predecessors, (11386), 8811 states have return successors, (12180), 11698 states have call predecessors, (12180), 11386 states have call successors, (12180) [2022-12-14 06:25:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139467 states to 139467 states and 185545 transitions. [2022-12-14 06:25:20,173 INFO L78 Accepts]: Start accepts. Automaton has 139467 states and 185545 transitions. Word has length 103 [2022-12-14 06:25:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:20,173 INFO L495 AbstractCegarLoop]: Abstraction has 139467 states and 185545 transitions. [2022-12-14 06:25:20,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:25:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 139467 states and 185545 transitions. [2022-12-14 06:25:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 06:25:20,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:20,191 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:25:20,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 06:25:20,191 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1675682102, now seen corresponding path program 1 times [2022-12-14 06:25:20,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395023281] [2022-12-14 06:25:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:20,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:25:20,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395023281] [2022-12-14 06:25:20,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395023281] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:20,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:25:20,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:25:20,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866462582] [2022-12-14 06:25:20,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:25:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:25:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:25:20,303 INFO L87 Difference]: Start difference. First operand 139467 states and 185545 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:25:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:33,053 INFO L93 Difference]: Finished difference Result 231303 states and 307761 transitions. [2022-12-14 06:25:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:25:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 104 [2022-12-14 06:25:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:33,369 INFO L225 Difference]: With dead ends: 231303 [2022-12-14 06:25:33,369 INFO L226 Difference]: Without dead ends: 161236 [2022-12-14 06:25:33,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:25:33,466 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 122 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:33,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 489 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:25:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161236 states. [2022-12-14 06:25:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161236 to 144868. [2022-12-14 06:25:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144868 states, 122978 states have (on average 1.3399632454585373) internal successors, (164786), 122730 states have internal predecessors, (164786), 12631 states have call successors, (12631), 9315 states have call predecessors, (12631), 9258 states have return successors, (13335), 12823 states have call predecessors, (13335), 12631 states have call successors, (13335) [2022-12-14 06:25:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144868 states to 144868 states and 190752 transitions. [2022-12-14 06:25:44,966 INFO L78 Accepts]: Start accepts. Automaton has 144868 states and 190752 transitions. Word has length 104 [2022-12-14 06:25:44,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:25:44,966 INFO L495 AbstractCegarLoop]: Abstraction has 144868 states and 190752 transitions. [2022-12-14 06:25:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 06:25:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 144868 states and 190752 transitions. [2022-12-14 06:25:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:25:45,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:25:45,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:25:45,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 06:25:45,053 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:25:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:25:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash 555013217, now seen corresponding path program 1 times [2022-12-14 06:25:45,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:25:45,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479624824] [2022-12-14 06:25:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:25:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 06:25:45,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:25:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479624824] [2022-12-14 06:25:45,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479624824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:25:45,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852138869] [2022-12-14 06:25:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:25:45,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:25:45,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:25:45,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:25:45,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:25:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:25:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:25:45,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:25:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 06:25:45,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:25:45,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852138869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:25:45,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:25:45,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:25:45,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821831568] [2022-12-14 06:25:45,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:25:45,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:25:45,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:25:45,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:25:45,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:25:45,319 INFO L87 Difference]: Start difference. First operand 144868 states and 190752 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 06:25:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:25:58,185 INFO L93 Difference]: Finished difference Result 210496 states and 278948 transitions. [2022-12-14 06:25:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:25:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 134 [2022-12-14 06:25:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:25:58,522 INFO L225 Difference]: With dead ends: 210496 [2022-12-14 06:25:58,522 INFO L226 Difference]: Without dead ends: 163211 [2022-12-14 06:25:58,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:25:58,608 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 70 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:25:58,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 250 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:25:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163211 states. [2022-12-14 06:26:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163211 to 143752. [2022-12-14 06:26:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143752 states, 122058 states have (on average 1.3369217912795557) internal successors, (163182), 121808 states have internal predecessors, (163182), 12559 states have call successors, (12559), 9267 states have call predecessors, (12559), 9134 states have return successors, (13107), 12677 states have call predecessors, (13107), 12559 states have call successors, (13107) [2022-12-14 06:26:12,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143752 states to 143752 states and 188848 transitions. [2022-12-14 06:26:12,614 INFO L78 Accepts]: Start accepts. Automaton has 143752 states and 188848 transitions. Word has length 134 [2022-12-14 06:26:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:12,614 INFO L495 AbstractCegarLoop]: Abstraction has 143752 states and 188848 transitions. [2022-12-14 06:26:12,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 06:26:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 143752 states and 188848 transitions. [2022-12-14 06:26:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:26:12,701 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:12,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:26:12,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:26:12,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:12,903 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1546177890, now seen corresponding path program 1 times [2022-12-14 06:26:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116254313] [2022-12-14 06:26:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:26:13,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:13,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116254313] [2022-12-14 06:26:13,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116254313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:13,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592884936] [2022-12-14 06:26:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:13,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:13,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:13,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:13,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:26:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:26:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 06:26:13,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:26:13,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592884936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:13,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:26:13,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:26:13,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111799020] [2022-12-14 06:26:13,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:13,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:26:13,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:13,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:26:13,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:26:13,263 INFO L87 Difference]: Start difference. First operand 143752 states and 188848 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 06:26:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:27,376 INFO L93 Difference]: Finished difference Result 232749 states and 307713 transitions. [2022-12-14 06:26:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:26:27,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 134 [2022-12-14 06:26:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:27,722 INFO L225 Difference]: With dead ends: 232749 [2022-12-14 06:26:27,722 INFO L226 Difference]: Without dead ends: 166613 [2022-12-14 06:26:27,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:26:27,815 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 72 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:27,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 257 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:26:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166613 states. [2022-12-14 06:26:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166613 to 140410. [2022-12-14 06:26:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140410 states, 119138 states have (on average 1.3336970571941782) internal successors, (158894), 118896 states have internal predecessors, (158894), 12379 states have call successors, (12379), 9135 states have call predecessors, (12379), 8892 states have return successors, (12703), 12379 states have call predecessors, (12703), 12379 states have call successors, (12703) [2022-12-14 06:26:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140410 states to 140410 states and 183976 transitions. [2022-12-14 06:26:42,392 INFO L78 Accepts]: Start accepts. Automaton has 140410 states and 183976 transitions. Word has length 134 [2022-12-14 06:26:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:42,393 INFO L495 AbstractCegarLoop]: Abstraction has 140410 states and 183976 transitions. [2022-12-14 06:26:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 1 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-14 06:26:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 140410 states and 183976 transitions. [2022-12-14 06:26:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:26:42,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:42,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:26:42,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 06:26:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 06:26:42,682 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1432791233, now seen corresponding path program 1 times [2022-12-14 06:26:42,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:42,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806949704] [2022-12-14 06:26:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:42,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 06:26:42,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806949704] [2022-12-14 06:26:42,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806949704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091703855] [2022-12-14 06:26:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:42,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:42,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:42,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:26:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:42,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:26:42,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:26:42,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:26:42,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091703855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:26:42,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:26:42,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 06:26:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739388745] [2022-12-14 06:26:42,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:26:42,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:26:42,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:26:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:26:42,843 INFO L87 Difference]: Start difference. First operand 140410 states and 183976 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:26:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:56,145 INFO L93 Difference]: Finished difference Result 261500 states and 347824 transitions. [2022-12-14 06:26:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:26:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-12-14 06:26:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:56,482 INFO L225 Difference]: With dead ends: 261500 [2022-12-14 06:26:56,482 INFO L226 Difference]: Without dead ends: 140140 [2022-12-14 06:26:56,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 135 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 06:26:56,613 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 111 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:56,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 342 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:26:56,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140140 states. [2022-12-14 06:27:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140140 to 139024. [2022-12-14 06:27:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139024 states, 117752 states have (on average 1.3098036551396155) internal successors, (154232), 117510 states have internal predecessors, (154232), 12379 states have call successors, (12379), 9135 states have call predecessors, (12379), 8892 states have return successors, (12703), 12379 states have call predecessors, (12703), 12379 states have call successors, (12703) [2022-12-14 06:27:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139024 states to 139024 states and 179314 transitions. [2022-12-14 06:27:10,651 INFO L78 Accepts]: Start accepts. Automaton has 139024 states and 179314 transitions. Word has length 134 [2022-12-14 06:27:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:27:10,651 INFO L495 AbstractCegarLoop]: Abstraction has 139024 states and 179314 transitions. [2022-12-14 06:27:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:27:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 139024 states and 179314 transitions. [2022-12-14 06:27:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:27:10,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:27:10,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 06:27:10,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:27:10,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 06:27:10,938 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:27:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:27:10,939 INFO L85 PathProgramCache]: Analyzing trace with hash 153385667, now seen corresponding path program 1 times [2022-12-14 06:27:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:27:10,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024719607] [2022-12-14 06:27:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:10,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:27:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 06:27:11,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:27:11,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024719607] [2022-12-14 06:27:11,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024719607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:27:11,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283182374] [2022-12-14 06:27:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:27:11,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:27:11,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:27:11,336 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:27:11,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc746b6-03b0-4156-8d02-00764be7d340/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:27:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:27:11,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:27:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:27:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 50 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:27:11,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:27:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 06:27:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283182374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:27:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664722910] [2022-12-14 06:27:11,913 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2022-12-14 06:27:11,914 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:27:11,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:27:11,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:27:11,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:27:17,986 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 115 for LOIs [2022-12-14 06:27:18,023 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2022-12-14 06:27:18,940 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2022-12-14 06:33:48,279 WARN L233 SmtUtils]: Spent 6.46m on a formula simplification that was a NOOP. DAG size: 2162 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)