./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.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_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/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_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/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_2be34897-ce86-4423-a8dd-f51ab8a53882/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 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 --- 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 06:43:25,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:43:25,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:43:25,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:43:25,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:43:25,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:43:25,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:43:25,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:43:25,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:43:25,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:43:25,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:43:25,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:43:25,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:43:25,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:43:25,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:43:25,727 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:43:25,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:43:25,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:43:25,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:43:25,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:43:25,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:43:25,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:43:25,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:43:25,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:43:25,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:43:25,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:43:25,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:43:25,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:43:25,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:43:25,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:43:25,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:43:25,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:43:25,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:43:25,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:43:25,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:43:25,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:43:25,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:43:25,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:43:25,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:43:25,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:43:25,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:43:25,750 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:43:25,764 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:43:25,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:43:25,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:43:25,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:43:25,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:43:25,766 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:43:25,766 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:43:25,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:43:25,766 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:43:25,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:43:25,766 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:43:25,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:43:25,766 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:43:25,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:43:25,767 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:43:25,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:43:25,767 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:43:25,767 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:43:25,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:43:25,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:43:25,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:43:25,769 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:43:25,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:43:25,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:43:25,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:43:25,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:43:25,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:43:25,769 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:43:25,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:43:25,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:43:25,770 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:43:25,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:43:25,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:43:25,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:43:25,770 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_2be34897-ce86-4423-a8dd-f51ab8a53882/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69030034dd333d91bcd0f7615fd4a158a32a8c2c03a6334daabdaad4c77a89b5 [2022-12-14 06:43:25,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:43:25,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:43:25,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:43:25,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:43:25,992 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:43:25,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2022-12-14 06:43:28,540 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:43:28,736 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:43:28,737 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c [2022-12-14 06:43:28,745 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/data/d45973de0/bbc67f67c75d49c2a875ff3c4c5f2b2a/FLAGa517e30a9 [2022-12-14 06:43:28,755 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/data/d45973de0/bbc67f67c75d49c2a875ff3c4c5f2b2a [2022-12-14 06:43:28,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:43:28,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:43:28,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:43:28,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:43:28,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:43:28,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:43:28" (1/1) ... [2022-12-14 06:43:28,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ada68c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:28, skipping insertion in model container [2022-12-14 06:43:28,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:43:28" (1/1) ... [2022-12-14 06:43:28,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:43:28,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:43:28,896 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_2be34897-ce86-4423-a8dd-f51ab8a53882/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2022-12-14 06:43:28,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:43:28,976 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:43:28,984 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_2be34897-ce86-4423-a8dd-f51ab8a53882/sv-benchmarks/c/systemc/mem_slave_tlm.4.cil.c[646,659] [2022-12-14 06:43:29,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:43:29,043 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:43:29,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29 WrapperNode [2022-12-14 06:43:29,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:43:29,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:43:29,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:43:29,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:43:29,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,086 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 861 [2022-12-14 06:43:29,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:43:29,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:43:29,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:43:29,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:43:29,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,113 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:43:29,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:43:29,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:43:29,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:43:29,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (1/1) ... [2022-12-14 06:43:29,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:43:29,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:29,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:43:29,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:43:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:43:29,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:43:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 06:43:29,182 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 06:43:29,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:43:29,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:43:29,264 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:43:29,266 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:43:29,792 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:43:29,945 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:43:29,945 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 06:43:29,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:43:29 BoogieIcfgContainer [2022-12-14 06:43:29,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:43:29,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:43:29,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:43:29,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:43:29,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:43:28" (1/3) ... [2022-12-14 06:43:29,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4f98eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:43:29, skipping insertion in model container [2022-12-14 06:43:29,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:43:29" (2/3) ... [2022-12-14 06:43:29,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a4f98eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:43:29, skipping insertion in model container [2022-12-14 06:43:29,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:43:29" (3/3) ... [2022-12-14 06:43:29,956 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.4.cil.c [2022-12-14 06:43:29,974 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:43:29,974 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:43:30,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:43:30,031 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;@1266f817, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:43:30,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:43:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 06:43:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:43:30,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:30,046 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] [2022-12-14 06:43:30,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:30,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1674287488, now seen corresponding path program 1 times [2022-12-14 06:43:30,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:30,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507506433] [2022-12-14 06:43:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:30,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:30,251 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 06:43:30,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:30,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507506433] [2022-12-14 06:43:30,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507506433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:30,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:30,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:43:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780243153] [2022-12-14 06:43:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:30,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:30,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:30,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:30,281 INFO L87 Difference]: Start difference. First operand has 231 states, 223 states have (on average 1.7847533632286996) internal successors, (398), 229 states have internal predecessors, (398), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:30,609 INFO L93 Difference]: Finished difference Result 624 states and 1094 transitions. [2022-12-14 06:43:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 06:43:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:30,623 INFO L225 Difference]: With dead ends: 624 [2022-12-14 06:43:30,623 INFO L226 Difference]: Without dead ends: 391 [2022-12-14 06:43:30,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:43:30,629 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 226 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:30,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 558 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:43:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-12-14 06:43:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 384. [2022-12-14 06:43:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.5343915343915344) internal successors, (580), 382 states have internal predecessors, (580), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 585 transitions. [2022-12-14 06:43:30,691 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 585 transitions. Word has length 24 [2022-12-14 06:43:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:30,691 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 585 transitions. [2022-12-14 06:43:30,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 585 transitions. [2022-12-14 06:43:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 06:43:30,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:30,694 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] [2022-12-14 06:43:30,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:43:30,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash -510195697, now seen corresponding path program 1 times [2022-12-14 06:43:30,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:30,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642654048] [2022-12-14 06:43:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:30,757 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 06:43:30,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642654048] [2022-12-14 06:43:30,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642654048] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:30,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:30,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:43:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350112740] [2022-12-14 06:43:30,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:30,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:30,761 INFO L87 Difference]: Start difference. First operand 384 states and 585 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:30,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:30,922 INFO L93 Difference]: Finished difference Result 997 states and 1548 transitions. [2022-12-14 06:43:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:30,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 06:43:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:30,925 INFO L225 Difference]: With dead ends: 997 [2022-12-14 06:43:30,925 INFO L226 Difference]: Without dead ends: 623 [2022-12-14 06:43:30,927 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 06:43:30,928 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 271 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:30,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 741 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-12-14 06:43:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 616. [2022-12-14 06:43:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.5721311475409836) internal successors, (959), 614 states have internal predecessors, (959), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 964 transitions. [2022-12-14 06:43:30,959 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 964 transitions. Word has length 36 [2022-12-14 06:43:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:30,960 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 964 transitions. [2022-12-14 06:43:30,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 964 transitions. [2022-12-14 06:43:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 06:43:30,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:30,962 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] [2022-12-14 06:43:30,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:43:30,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1685973572, now seen corresponding path program 1 times [2022-12-14 06:43:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:30,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776176500] [2022-12-14 06:43:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:31,016 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 06:43:31,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:31,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776176500] [2022-12-14 06:43:31,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776176500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:31,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:31,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:43:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584062906] [2022-12-14 06:43:31,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:31,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:31,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:31,019 INFO L87 Difference]: Start difference. First operand 616 states and 964 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:31,144 INFO L93 Difference]: Finished difference Result 1564 states and 2449 transitions. [2022-12-14 06:43:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-14 06:43:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:31,149 INFO L225 Difference]: With dead ends: 1564 [2022-12-14 06:43:31,149 INFO L226 Difference]: Without dead ends: 958 [2022-12-14 06:43:31,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:43:31,151 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 293 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:31,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 597 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:31,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-12-14 06:43:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 947. [2022-12-14 06:43:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 941 states have (on average 1.5642933049946866) internal successors, (1472), 945 states have internal predecessors, (1472), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1477 transitions. [2022-12-14 06:43:31,202 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1477 transitions. Word has length 37 [2022-12-14 06:43:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:31,203 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1477 transitions. [2022-12-14 06:43:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1477 transitions. [2022-12-14 06:43:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 06:43:31,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:31,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:31,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:43:31,205 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:31,205 INFO L85 PathProgramCache]: Analyzing trace with hash 578738018, now seen corresponding path program 1 times [2022-12-14 06:43:31,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:31,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204288055] [2022-12-14 06:43:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:31,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:43:31,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:31,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204288055] [2022-12-14 06:43:31,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204288055] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:31,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:31,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:43:31,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106216508] [2022-12-14 06:43:31,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:31,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:31,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:31,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:31,280 INFO L87 Difference]: Start difference. First operand 947 states and 1477 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:31,428 INFO L93 Difference]: Finished difference Result 2544 states and 3981 transitions. [2022-12-14 06:43:31,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:31,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 06:43:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:31,433 INFO L225 Difference]: With dead ends: 2544 [2022-12-14 06:43:31,433 INFO L226 Difference]: Without dead ends: 1607 [2022-12-14 06:43:31,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:43:31,435 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 343 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:31,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 777 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-12-14 06:43:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1505. [2022-12-14 06:43:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1499 states have (on average 1.5557038025350234) internal successors, (2332), 1503 states have internal predecessors, (2332), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 2337 transitions. [2022-12-14 06:43:31,523 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 2337 transitions. Word has length 41 [2022-12-14 06:43:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:31,523 INFO L495 AbstractCegarLoop]: Abstraction has 1505 states and 2337 transitions. [2022-12-14 06:43:31,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 2337 transitions. [2022-12-14 06:43:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 06:43:31,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:31,524 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] [2022-12-14 06:43:31,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:43:31,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:31,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1048944377, now seen corresponding path program 1 times [2022-12-14 06:43:31,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:31,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496765502] [2022-12-14 06:43:31,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:31,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:31,569 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 06:43:31,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:31,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496765502] [2022-12-14 06:43:31,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496765502] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:31,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:31,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:43:31,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665010510] [2022-12-14 06:43:31,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:31,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:31,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:31,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:31,572 INFO L87 Difference]: Start difference. First operand 1505 states and 2337 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:31,841 INFO L93 Difference]: Finished difference Result 4290 states and 6652 transitions. [2022-12-14 06:43:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:31,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 06:43:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:31,852 INFO L225 Difference]: With dead ends: 4290 [2022-12-14 06:43:31,852 INFO L226 Difference]: Without dead ends: 2793 [2022-12-14 06:43:31,855 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 06:43:31,856 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 315 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:31,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 615 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2022-12-14 06:43:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2740. [2022-12-14 06:43:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2734 states have (on average 1.5303584491587419) internal successors, (4184), 2738 states have internal predecessors, (4184), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 4189 transitions. [2022-12-14 06:43:31,965 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 4189 transitions. Word has length 48 [2022-12-14 06:43:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:31,965 INFO L495 AbstractCegarLoop]: Abstraction has 2740 states and 4189 transitions. [2022-12-14 06:43:31,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 4189 transitions. [2022-12-14 06:43:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 06:43:31,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:31,966 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] [2022-12-14 06:43:31,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:43:31,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1510473557, now seen corresponding path program 1 times [2022-12-14 06:43:31,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522068214] [2022-12-14 06:43:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:31,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:32,007 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 06:43:32,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:32,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522068214] [2022-12-14 06:43:32,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522068214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:32,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:32,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:43:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50593413] [2022-12-14 06:43:32,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:32,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:32,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:32,009 INFO L87 Difference]: Start difference. First operand 2740 states and 4189 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:32,217 INFO L93 Difference]: Finished difference Result 6433 states and 9806 transitions. [2022-12-14 06:43:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 06:43:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:32,230 INFO L225 Difference]: With dead ends: 6433 [2022-12-14 06:43:32,231 INFO L226 Difference]: Without dead ends: 3702 [2022-12-14 06:43:32,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:43:32,236 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 302 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:32,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 528 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-12-14 06:43:32,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 3554. [2022-12-14 06:43:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3548 states have (on average 1.5146561443066517) internal successors, (5374), 3552 states have internal predecessors, (5374), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 5379 transitions. [2022-12-14 06:43:32,423 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 5379 transitions. Word has length 48 [2022-12-14 06:43:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:32,424 INFO L495 AbstractCegarLoop]: Abstraction has 3554 states and 5379 transitions. [2022-12-14 06:43:32,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 5379 transitions. [2022-12-14 06:43:32,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 06:43:32,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:32,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:32,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:43:32,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:32,426 INFO L85 PathProgramCache]: Analyzing trace with hash 515765123, now seen corresponding path program 1 times [2022-12-14 06:43:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:32,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769442728] [2022-12-14 06:43:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:32,465 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 06:43:32,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769442728] [2022-12-14 06:43:32,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769442728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:32,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:32,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:43:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704832644] [2022-12-14 06:43:32,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:32,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:32,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:32,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:32,467 INFO L87 Difference]: Start difference. First operand 3554 states and 5379 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:32,922 INFO L93 Difference]: Finished difference Result 8592 states and 13055 transitions. [2022-12-14 06:43:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-14 06:43:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:32,955 INFO L225 Difference]: With dead ends: 8592 [2022-12-14 06:43:32,955 INFO L226 Difference]: Without dead ends: 5047 [2022-12-14 06:43:32,961 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 06:43:32,962 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 214 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:32,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 628 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:43:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2022-12-14 06:43:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 4964. [2022-12-14 06:43:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4958 states have (on average 1.4441306978620412) internal successors, (7160), 4962 states have internal predecessors, (7160), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 7165 transitions. [2022-12-14 06:43:33,267 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 7165 transitions. Word has length 55 [2022-12-14 06:43:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:33,267 INFO L495 AbstractCegarLoop]: Abstraction has 4964 states and 7165 transitions. [2022-12-14 06:43:33,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 7165 transitions. [2022-12-14 06:43:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 06:43:33,270 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:33,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:33,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:43:33,270 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:33,271 INFO L85 PathProgramCache]: Analyzing trace with hash 562449711, now seen corresponding path program 1 times [2022-12-14 06:43:33,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:33,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841078083] [2022-12-14 06:43:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:33,331 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 06:43:33,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:33,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841078083] [2022-12-14 06:43:33,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841078083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:33,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:33,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:43:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838915071] [2022-12-14 06:43:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:33,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:33,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:33,333 INFO L87 Difference]: Start difference. First operand 4964 states and 7165 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:33,648 INFO L93 Difference]: Finished difference Result 9784 states and 14152 transitions. [2022-12-14 06:43:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:33,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 06:43:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:33,665 INFO L225 Difference]: With dead ends: 9784 [2022-12-14 06:43:33,665 INFO L226 Difference]: Without dead ends: 4829 [2022-12-14 06:43:33,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:43:33,672 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 287 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:33,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 334 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4829 states. [2022-12-14 06:43:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4829 to 4829. [2022-12-14 06:43:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4823 states have (on average 1.4349989633008502) internal successors, (6921), 4827 states have internal predecessors, (6921), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 6926 transitions. [2022-12-14 06:43:33,936 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 6926 transitions. Word has length 57 [2022-12-14 06:43:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:33,936 INFO L495 AbstractCegarLoop]: Abstraction has 4829 states and 6926 transitions. [2022-12-14 06:43:33,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 6926 transitions. [2022-12-14 06:43:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 06:43:33,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:33,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:43:33,940 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:33,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1813730565, now seen corresponding path program 1 times [2022-12-14 06:43:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:33,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751286285] [2022-12-14 06:43:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:33,999 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 06:43:33,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:33,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751286285] [2022-12-14 06:43:33,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751286285] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:34,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:34,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:43:34,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453510587] [2022-12-14 06:43:34,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:34,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:34,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:34,001 INFO L87 Difference]: Start difference. First operand 4829 states and 6926 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:34,356 INFO L93 Difference]: Finished difference Result 10075 states and 14616 transitions. [2022-12-14 06:43:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:34,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-14 06:43:34,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:34,371 INFO L225 Difference]: With dead ends: 10075 [2022-12-14 06:43:34,371 INFO L226 Difference]: Without dead ends: 5255 [2022-12-14 06:43:34,376 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 06:43:34,377 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 264 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:34,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 751 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2022-12-14 06:43:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 3693. [2022-12-14 06:43:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 3687 states have (on average 1.4521291022511527) internal successors, (5354), 3691 states have internal predecessors, (5354), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5359 transitions. [2022-12-14 06:43:34,514 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5359 transitions. Word has length 58 [2022-12-14 06:43:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:34,514 INFO L495 AbstractCegarLoop]: Abstraction has 3693 states and 5359 transitions. [2022-12-14 06:43:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5359 transitions. [2022-12-14 06:43:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 06:43:34,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:34,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:34,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:43:34,515 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 750292349, now seen corresponding path program 1 times [2022-12-14 06:43:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:34,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752631210] [2022-12-14 06:43:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:34,615 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 06:43:34,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:34,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752631210] [2022-12-14 06:43:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752631210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:34,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:43:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033918670] [2022-12-14 06:43:34,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:34,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:43:34,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:43:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:43:34,617 INFO L87 Difference]: Start difference. First operand 3693 states and 5359 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:36,006 INFO L93 Difference]: Finished difference Result 16798 states and 24182 transitions. [2022-12-14 06:43:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 06:43:36,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-12-14 06:43:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:36,030 INFO L225 Difference]: With dead ends: 16798 [2022-12-14 06:43:36,030 INFO L226 Difference]: Without dead ends: 13202 [2022-12-14 06:43:36,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:43:36,037 INFO L413 NwaCegarLoop]: 1192 mSDtfsCounter, 2080 mSDsluCounter, 3894 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 5086 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:36,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2080 Valid, 5086 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:43:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13202 states. [2022-12-14 06:43:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13202 to 4467. [2022-12-14 06:43:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4467 states, 4461 states have (on average 1.4440708361353956) internal successors, (6442), 4465 states have internal predecessors, (6442), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6447 transitions. [2022-12-14 06:43:36,436 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6447 transitions. Word has length 60 [2022-12-14 06:43:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:36,437 INFO L495 AbstractCegarLoop]: Abstraction has 4467 states and 6447 transitions. [2022-12-14 06:43:36,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 states have internal predecessors, (59), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6447 transitions. [2022-12-14 06:43:36,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:43:36,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:36,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:36,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:43:36,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:36,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1247439856, now seen corresponding path program 1 times [2022-12-14 06:43:36,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:36,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175883086] [2022-12-14 06:43:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:36,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:36,530 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 06:43:36,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:36,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175883086] [2022-12-14 06:43:36,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175883086] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:36,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:36,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:43:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135743638] [2022-12-14 06:43:36,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:36,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:43:36,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:36,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:43:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:43:36,532 INFO L87 Difference]: Start difference. First operand 4467 states and 6447 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:39,152 INFO L93 Difference]: Finished difference Result 29620 states and 42518 transitions. [2022-12-14 06:43:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 06:43:39,152 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 06:43:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:39,191 INFO L225 Difference]: With dead ends: 29620 [2022-12-14 06:43:39,191 INFO L226 Difference]: Without dead ends: 25250 [2022-12-14 06:43:39,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:43:39,198 INFO L413 NwaCegarLoop]: 1416 mSDtfsCounter, 3215 mSDsluCounter, 5148 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3215 SdHoareTripleChecker+Valid, 6564 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:39,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3215 Valid, 6564 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:43:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25250 states. [2022-12-14 06:43:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25250 to 4751. [2022-12-14 06:43:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4751 states, 4745 states have (on average 1.4343519494204426) internal successors, (6806), 4749 states have internal predecessors, (6806), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4751 states to 4751 states and 6811 transitions. [2022-12-14 06:43:39,619 INFO L78 Accepts]: Start accepts. Automaton has 4751 states and 6811 transitions. Word has length 61 [2022-12-14 06:43:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:39,619 INFO L495 AbstractCegarLoop]: Abstraction has 4751 states and 6811 transitions. [2022-12-14 06:43:39,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4751 states and 6811 transitions. [2022-12-14 06:43:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 06:43:39,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:39,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:39,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:43:39,621 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash 891650770, now seen corresponding path program 1 times [2022-12-14 06:43:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:39,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26124843] [2022-12-14 06:43:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:43:39,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:39,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26124843] [2022-12-14 06:43:39,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26124843] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:39,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:39,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:43:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347692833] [2022-12-14 06:43:39,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:39,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:39,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:39,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:39,645 INFO L87 Difference]: Start difference. First operand 4751 states and 6811 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:40,160 INFO L93 Difference]: Finished difference Result 10027 states and 14343 transitions. [2022-12-14 06:43:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-14 06:43:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:40,171 INFO L225 Difference]: With dead ends: 10027 [2022-12-14 06:43:40,171 INFO L226 Difference]: Without dead ends: 5300 [2022-12-14 06:43:40,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 06:43:40,178 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 130 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:40,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 632 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2022-12-14 06:43:40,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 4802. [2022-12-14 06:43:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4802 states, 4796 states have (on average 1.4311926605504588) internal successors, (6864), 4800 states have internal predecessors, (6864), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4802 states to 4802 states and 6869 transitions. [2022-12-14 06:43:40,522 INFO L78 Accepts]: Start accepts. Automaton has 4802 states and 6869 transitions. Word has length 72 [2022-12-14 06:43:40,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:40,522 INFO L495 AbstractCegarLoop]: Abstraction has 4802 states and 6869 transitions. [2022-12-14 06:43:40,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:40,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4802 states and 6869 transitions. [2022-12-14 06:43:40,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 06:43:40,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:40,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:40,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:43:40,524 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:40,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:40,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1115708227, now seen corresponding path program 1 times [2022-12-14 06:43:40,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:40,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971689491] [2022-12-14 06:43:40,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:40,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:43:40,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971689491] [2022-12-14 06:43:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971689491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:40,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:40,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:43:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632646116] [2022-12-14 06:43:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:43:40,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:43:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:43:40,571 INFO L87 Difference]: Start difference. First operand 4802 states and 6869 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:41,299 INFO L93 Difference]: Finished difference Result 11565 states and 16492 transitions. [2022-12-14 06:43:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:43:41,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-12-14 06:43:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:41,306 INFO L225 Difference]: With dead ends: 11565 [2022-12-14 06:43:41,306 INFO L226 Difference]: Without dead ends: 6714 [2022-12-14 06:43:41,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:43:41,311 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 441 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:41,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 969 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2022-12-14 06:43:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 5439. [2022-12-14 06:43:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5433 states have (on average 1.4163445610160132) internal successors, (7695), 5437 states have internal predecessors, (7695), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 7700 transitions. [2022-12-14 06:43:41,707 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 7700 transitions. Word has length 83 [2022-12-14 06:43:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:41,708 INFO L495 AbstractCegarLoop]: Abstraction has 5439 states and 7700 transitions. [2022-12-14 06:43:41,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 7700 transitions. [2022-12-14 06:43:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 06:43:41,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:41,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:43:41,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:43:41,709 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:41,709 INFO L85 PathProgramCache]: Analyzing trace with hash -837003017, now seen corresponding path program 1 times [2022-12-14 06:43:41,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:41,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727102954] [2022-12-14 06:43:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:43:41,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:41,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727102954] [2022-12-14 06:43:41,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727102954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:41,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:41,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:43:41,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510657092] [2022-12-14 06:43:41,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:41,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:41,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:43:41,762 INFO L87 Difference]: Start difference. First operand 5439 states and 7700 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:42,091 INFO L93 Difference]: Finished difference Result 7990 states and 11377 transitions. [2022-12-14 06:43:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:42,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-12-14 06:43:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:42,095 INFO L225 Difference]: With dead ends: 7990 [2022-12-14 06:43:42,095 INFO L226 Difference]: Without dead ends: 2505 [2022-12-14 06:43:42,099 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 06:43:42,099 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 308 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:42,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 431 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2022-12-14 06:43:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2469. [2022-12-14 06:43:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 2463 states have (on average 1.3686561104344295) internal successors, (3371), 2467 states have internal predecessors, (3371), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 3376 transitions. [2022-12-14 06:43:42,286 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 3376 transitions. Word has length 89 [2022-12-14 06:43:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:42,287 INFO L495 AbstractCegarLoop]: Abstraction has 2469 states and 3376 transitions. [2022-12-14 06:43:42,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 3376 transitions. [2022-12-14 06:43:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 06:43:42,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:42,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:42,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:43:42,288 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1617084908, now seen corresponding path program 1 times [2022-12-14 06:43:42,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:42,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066073174] [2022-12-14 06:43:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:42,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:43:42,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:42,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066073174] [2022-12-14 06:43:42,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066073174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:42,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:42,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:43:42,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436838290] [2022-12-14 06:43:42,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:42,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:43:42,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:43:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:43:42,332 INFO L87 Difference]: Start difference. First operand 2469 states and 3376 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:43,472 INFO L93 Difference]: Finished difference Result 9402 states and 12914 transitions. [2022-12-14 06:43:43,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:43:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-12-14 06:43:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:43,478 INFO L225 Difference]: With dead ends: 9402 [2022-12-14 06:43:43,478 INFO L226 Difference]: Without dead ends: 7048 [2022-12-14 06:43:43,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:43:43,481 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 1411 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:43,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 2695 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:43:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7048 states. [2022-12-14 06:43:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7048 to 2471. [2022-12-14 06:43:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.365922920892495) internal successors, (3367), 2469 states have internal predecessors, (3367), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3372 transitions. [2022-12-14 06:43:43,704 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3372 transitions. Word has length 93 [2022-12-14 06:43:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:43,704 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3372 transitions. [2022-12-14 06:43:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3372 transitions. [2022-12-14 06:43:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 06:43:43,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:43,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:43,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:43:43,705 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 218901231, now seen corresponding path program 1 times [2022-12-14 06:43:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:43,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120134379] [2022-12-14 06:43:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:43,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:43:43,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:43,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120134379] [2022-12-14 06:43:43,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120134379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:43,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441344424] [2022-12-14 06:43:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:43,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:43,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:43,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:43,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:43:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:43,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:43:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:43:43,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:43:43,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441344424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:43,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:43:43,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 06:43:43,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009414563] [2022-12-14 06:43:43,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:43,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:43,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:43,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:43,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:43,937 INFO L87 Difference]: Start difference. First operand 2471 states and 3372 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:44,299 INFO L93 Difference]: Finished difference Result 2496 states and 3395 transitions. [2022-12-14 06:43:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-12-14 06:43:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:44,302 INFO L225 Difference]: With dead ends: 2496 [2022-12-14 06:43:44,302 INFO L226 Difference]: Without dead ends: 2492 [2022-12-14 06:43:44,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:44,303 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 208 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:44,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 638 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:44,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-12-14 06:43:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2471. [2022-12-14 06:43:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3606490872210952) internal successors, (3354), 2469 states have internal predecessors, (3354), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3359 transitions. [2022-12-14 06:43:44,527 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3359 transitions. Word has length 95 [2022-12-14 06:43:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:44,527 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3359 transitions. [2022-12-14 06:43:44,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3359 transitions. [2022-12-14 06:43:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 06:43:44,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:44,529 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:44,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:43:44,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:43:44,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1606884607, now seen corresponding path program 1 times [2022-12-14 06:43:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124541931] [2022-12-14 06:43:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:43:44,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:44,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124541931] [2022-12-14 06:43:44,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124541931] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740178098] [2022-12-14 06:43:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:44,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:43:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:44,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:43:44,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:43:45,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:43:45,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740178098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:45,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:43:45,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 06:43:45,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374947690] [2022-12-14 06:43:45,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:45,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:45,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:45,008 INFO L87 Difference]: Start difference. First operand 2471 states and 3359 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:45,377 INFO L93 Difference]: Finished difference Result 4805 states and 6569 transitions. [2022-12-14 06:43:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2022-12-14 06:43:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:45,380 INFO L225 Difference]: With dead ends: 4805 [2022-12-14 06:43:45,380 INFO L226 Difference]: Without dead ends: 2471 [2022-12-14 06:43:45,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 147 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 06:43:45,384 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:45,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 340 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:43:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-12-14 06:43:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2471. [2022-12-14 06:43:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3322515212981745) internal successors, (3284), 2469 states have internal predecessors, (3284), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3289 transitions. [2022-12-14 06:43:45,623 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3289 transitions. Word has length 148 [2022-12-14 06:43:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:45,623 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3289 transitions. [2022-12-14 06:43:45,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:45,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3289 transitions. [2022-12-14 06:43:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 06:43:45,624 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:45,625 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:45,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:43:45,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 06:43:45,826 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:45,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2116387570, now seen corresponding path program 1 times [2022-12-14 06:43:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:45,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225293221] [2022-12-14 06:43:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:45,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:43:45,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:45,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225293221] [2022-12-14 06:43:45,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225293221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:45,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476422095] [2022-12-14 06:43:45,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:45,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:45,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:45,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:43:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:43:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:43:46,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:43:46,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476422095] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:46,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:43:46,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:43:46,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393972195] [2022-12-14 06:43:46,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:46,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:46,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:46,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:46,090 INFO L87 Difference]: Start difference. First operand 2471 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:46,474 INFO L93 Difference]: Finished difference Result 4805 states and 6429 transitions. [2022-12-14 06:43:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-12-14 06:43:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:46,477 INFO L225 Difference]: With dead ends: 4805 [2022-12-14 06:43:46,477 INFO L226 Difference]: Without dead ends: 2471 [2022-12-14 06:43:46,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:46,479 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 247 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:46,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 312 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:43:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-12-14 06:43:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2471. [2022-12-14 06:43:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2465 states have (on average 1.3038539553752535) internal successors, (3214), 2469 states have internal predecessors, (3214), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 3219 transitions. [2022-12-14 06:43:46,707 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 3219 transitions. Word has length 151 [2022-12-14 06:43:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:46,707 INFO L495 AbstractCegarLoop]: Abstraction has 2471 states and 3219 transitions. [2022-12-14 06:43:46,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 3219 transitions. [2022-12-14 06:43:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 06:43:46,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:46,709 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:46,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 06:43:46,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:43:46,910 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash 30760439, now seen corresponding path program 1 times [2022-12-14 06:43:46,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:46,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491312453] [2022-12-14 06:43:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:46,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:43:47,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:47,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491312453] [2022-12-14 06:43:47,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491312453] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:47,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244011047] [2022-12-14 06:43:47,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:47,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:47,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:47,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:47,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:43:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:47,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:43:47,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:43:47,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:43:47,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244011047] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:47,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:43:47,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:43:47,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229751666] [2022-12-14 06:43:47,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:47,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:43:47,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:47,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:43:47,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:47,118 INFO L87 Difference]: Start difference. First operand 2471 states and 3219 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:43:47,748 INFO L93 Difference]: Finished difference Result 5544 states and 7364 transitions. [2022-12-14 06:43:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:43:47,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-12-14 06:43:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:43:47,752 INFO L225 Difference]: With dead ends: 5544 [2022-12-14 06:43:47,752 INFO L226 Difference]: Without dead ends: 3210 [2022-12-14 06:43:47,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:47,754 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 181 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:43:47,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 554 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:43:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2022-12-14 06:43:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3026. [2022-12-14 06:43:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3020 states have (on average 1.2841059602649008) internal successors, (3878), 3024 states have internal predecessors, (3878), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 3883 transitions. [2022-12-14 06:43:48,051 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 3883 transitions. Word has length 152 [2022-12-14 06:43:48,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:48,051 INFO L495 AbstractCegarLoop]: Abstraction has 3026 states and 3883 transitions. [2022-12-14 06:43:48,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:43:48,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 3883 transitions. [2022-12-14 06:43:48,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 06:43:48,052 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:48,052 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:43:48,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:43:48,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:48,254 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 929578520, now seen corresponding path program 1 times [2022-12-14 06:43:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354379298] [2022-12-14 06:43:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:48,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:43:48,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354379298] [2022-12-14 06:43:48,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354379298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:43:48,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035227965] [2022-12-14 06:43:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:48,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:43:48,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:43:48,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:43:48,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:43:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 06:43:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:43:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:43:48,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:43:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:43:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035227965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:43:48,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690642372] [2022-12-14 06:43:49,008 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2022-12-14 06:43:49,008 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:43:49,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:43:49,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:43:49,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:44:19,589 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:44:58,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [690642372] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:44:58,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:44:58,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [9, 9, 9] total 59 [2022-12-14 06:44:58,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83942702] [2022-12-14 06:44:58,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:44:58,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 06:44:58,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:44:58,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 06:44:58,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 06:44:58,401 INFO L87 Difference]: Start difference. First operand 3026 states and 3883 transitions. Second operand has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:45:20,003 INFO L93 Difference]: Finished difference Result 6089 states and 7807 transitions. [2022-12-14 06:45:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 06:45:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-12-14 06:45:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:45:20,007 INFO L225 Difference]: With dead ends: 6089 [2022-12-14 06:45:20,007 INFO L226 Difference]: Without dead ends: 3055 [2022-12-14 06:45:20,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 379 SyntacticMatches, 34 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=319, Invalid=4793, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 06:45:20,010 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 115 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 10322 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 10361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 10322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:45:20,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1492 Invalid, 10361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 10322 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2022-12-14 06:45:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-12-14 06:45:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3050. [2022-12-14 06:45:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3044 states have (on average 1.2792378449408672) internal successors, (3894), 3048 states have internal predecessors, (3894), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 3899 transitions. [2022-12-14 06:45:20,366 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 3899 transitions. Word has length 154 [2022-12-14 06:45:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:45:20,367 INFO L495 AbstractCegarLoop]: Abstraction has 3050 states and 3899 transitions. [2022-12-14 06:45:20,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 51 states have internal predecessors, (113), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:45:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 3899 transitions. [2022-12-14 06:45:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-12-14 06:45:20,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:45:20,369 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 06:45:20,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:45:20,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:20,571 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:45:20,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:45:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1579232027, now seen corresponding path program 1 times [2022-12-14 06:45:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:45:20,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283849678] [2022-12-14 06:45:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:45:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:45:20,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:45:20,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283849678] [2022-12-14 06:45:20,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283849678] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:45:20,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172514857] [2022-12-14 06:45:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:45:20,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:45:20,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:45:20,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:45:20,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:45:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:45:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:45:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:45:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:45:21,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:45:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 10 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:45:21,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172514857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:45:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71128858] [2022-12-14 06:45:21,532 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2022-12-14 06:45:21,532 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:45:21,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:45:21,532 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:45:21,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:46:10,046 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 105 for LOIs [2022-12-14 06:46:10,070 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:46:40,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '327066#(and (= ~c_read_req_ev~0 2) (or (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (= ~s_memory2~0 0) (<= ~req_t_type___0~0 1) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (= 2 ~s_run_pc~0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0)) (and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (not (= ~c_req_a~0 1)) (<= 0 ~c_rsp_status~0) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (= ~c_req_type~0 1) (= ~rsp_tt_status~0 0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (= ~s_memory2~0 0) (<= ~req_t_type___0~0 1) (= ~s_run_pc~0 0) (= ~req_t_type~0 1) (<= 0 ~req_t_type___0~0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (not (= 3 ~c_req_a~0)) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (= ~c_empty_req~0 1) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (not (= ~c_req_a~0 0)) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (<= 0 |#StackHeapBarrier|) (not (= 2 ~c_req_a~0)) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0))))' at error location [2022-12-14 06:46:40,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:46:40,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:46:40,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-12-14 06:46:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838723958] [2022-12-14 06:46:40,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:46:40,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:46:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:46:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:46:40,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4060, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 06:46:40,131 INFO L87 Difference]: Start difference. First operand 3050 states and 3899 transitions. Second operand has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:46:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:46:44,607 INFO L93 Difference]: Finished difference Result 18759 states and 24119 transitions. [2022-12-14 06:46:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 06:46:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-12-14 06:46:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:46:44,622 INFO L225 Difference]: With dead ends: 18759 [2022-12-14 06:46:44,622 INFO L226 Difference]: Without dead ends: 15870 [2022-12-14 06:46:44,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 690 SyntacticMatches, 21 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=480, Invalid=9420, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 06:46:44,627 INFO L413 NwaCegarLoop]: 1193 mSDtfsCounter, 5481 mSDsluCounter, 8334 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5481 SdHoareTripleChecker+Valid, 9527 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:46:44,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5481 Valid, 9527 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:46:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15870 states. [2022-12-14 06:46:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15870 to 5642. [2022-12-14 06:46:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5642 states, 5636 states have (on average 1.2872604684173172) internal successors, (7255), 5640 states have internal predecessors, (7255), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:46:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5642 states to 5642 states and 7260 transitions. [2022-12-14 06:46:45,574 INFO L78 Accepts]: Start accepts. Automaton has 5642 states and 7260 transitions. Word has length 249 [2022-12-14 06:46:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:46:45,574 INFO L495 AbstractCegarLoop]: Abstraction has 5642 states and 7260 transitions. [2022-12-14 06:46:45,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.09090909090909) internal successors, (243), 11 states have internal predecessors, (243), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:46:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5642 states and 7260 transitions. [2022-12-14 06:46:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-12-14 06:46:45,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:46:45,578 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 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 06:46:45,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:46:45,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 06:46:45,780 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:46:45,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:46:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1796099639, now seen corresponding path program 1 times [2022-12-14 06:46:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:46:45,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582221712] [2022-12-14 06:46:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:45,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:46:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 122 proven. 329 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:46:46,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:46:46,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582221712] [2022-12-14 06:46:46,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582221712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:46:46,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24983868] [2022-12-14 06:46:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:46:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:46:46,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:46:46,215 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:46:46,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:46:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:46:46,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 06:46:46,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:46:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:46:46,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:46:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 436 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:46:46,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24983868] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:46:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921872659] [2022-12-14 06:46:46,878 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2022-12-14 06:46:46,878 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:46:46,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:46:46,878 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:46:46,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:47:33,318 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 148 for LOIs [2022-12-14 06:47:33,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:48:03,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '365871#(and (<= ~rsp_t_status___0~0 1) (<= 0 ~req_t_d___0~0) (<= 0 ~c_rsp_status~0) (<= ~req_t_type~0 1) (<= 0 ~rsp_t_type___0~0) (<= 0 ~rsp_t_status___0~0) (<= ~rsp_t_type___0~0 1) (<= 0 ~s_memory1~0) (<= ~req_t_type___0~0 1) (<= 0 ~s_run_pc~0) (or (and (= ~rsp_tt_status~0 0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (= 2 ~s_run_pc~0) (= ~c_empty_req~0 1) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0)) (and (= ~rsp_tt_status~0 0) (= ~s_memory2~0 0) (= ~req_tt_a~0 0) (= ~c_m_ev~0 2) (= ~m_run_st~0 2) (= 2 ~c_read_rsp_ev~0) (= ~req_tt_d~0 0) (= ~c_empty_req~0 1) (= ~s_run_i~0 1) (= 2 ~c_write_rsp_ev~0) (= ~c_empty_rsp~0 1) (= ~m_run_pc~0 3) (= ~m_run_i~0 1) (= ~s_memory3~0 0) (= 2 ~c_write_req_ev~0) (= |#NULL.offset| 0) (= 0 ~req_tt_type~0) (= ~s_run_st~0 1) (= ~c_m_lock~0 1) (= ~rsp_tt_type~0 0) (= ~rsp_tt_d~0 0) (= |#NULL.base| 0))) (<= 0 ~req_t_type___0~0) (= ~c_read_req_ev~0 2) (<= 50 ~req_t_d~0) (<= 50 ~c_req_d~0) (<= 0 ~s_memory0~0) (<= 0 ~c_rsp_type~0) (<= ~c_rsp_status~0 1) (<= 0 ~a_t~0) (<= ~c_rsp_type~0 1) (<= 0 ~c_req_a~0) (<= 1 ~req_t_type~0) (<= ~c_req_type~0 1) (<= 1 ~c_req_type~0) (<= 0 ~req_t_a___0~0) (<= 0 ~req_t_a~0) (<= ~s_run_pc~0 2) (<= 0 |#StackHeapBarrier|) (<= 0 ~s_memory2~0))' at error location [2022-12-14 06:48:03,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:48:03,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:48:03,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-12-14 06:48:03,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822517195] [2022-12-14 06:48:03,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:48:03,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:48:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:48:03,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=4733, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 06:48:03,800 INFO L87 Difference]: Start difference. First operand 5642 states and 7260 transitions. Second operand has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:10,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:48:10,723 INFO L93 Difference]: Finished difference Result 25101 states and 32310 transitions. [2022-12-14 06:48:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 06:48:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-12-14 06:48:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:48:10,741 INFO L225 Difference]: With dead ends: 25101 [2022-12-14 06:48:10,741 INFO L226 Difference]: Without dead ends: 19620 [2022-12-14 06:48:10,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 982 SyntacticMatches, 27 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5931 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=896, Invalid=15106, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 06:48:10,751 INFO L413 NwaCegarLoop]: 1700 mSDtfsCounter, 14480 mSDsluCounter, 17626 mSDsCounter, 0 mSdLazyCounter, 3261 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14480 SdHoareTripleChecker+Valid, 19326 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 3261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:48:10,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14480 Valid, 19326 Invalid, 3564 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [303 Valid, 3261 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 06:48:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2022-12-14 06:48:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 6679. [2022-12-14 06:48:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 6673 states have (on average 1.2913232429192267) internal successors, (8617), 6677 states have internal predecessors, (8617), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 8622 transitions. [2022-12-14 06:48:11,821 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 8622 transitions. Word has length 345 [2022-12-14 06:48:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:48:11,822 INFO L495 AbstractCegarLoop]: Abstraction has 6679 states and 8622 transitions. [2022-12-14 06:48:11,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.27777777777778) internal successors, (527), 18 states have internal predecessors, (527), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:11,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 8622 transitions. [2022-12-14 06:48:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-12-14 06:48:11,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:48:11,824 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:48:11,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:48:12,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 06:48:12,026 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:48:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:48:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 281616459, now seen corresponding path program 1 times [2022-12-14 06:48:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:48:12,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24689473] [2022-12-14 06:48:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:48:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-12-14 06:48:12,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:12,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24689473] [2022-12-14 06:48:12,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24689473] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:48:12,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:48:12,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 06:48:12,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397340017] [2022-12-14 06:48:12,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:48:12,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:48:12,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:12,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:48:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:48:12,246 INFO L87 Difference]: Start difference. First operand 6679 states and 8622 transitions. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:48:16,492 INFO L93 Difference]: Finished difference Result 28956 states and 37515 transitions. [2022-12-14 06:48:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 06:48:16,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2022-12-14 06:48:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:48:16,514 INFO L225 Difference]: With dead ends: 28956 [2022-12-14 06:48:16,514 INFO L226 Difference]: Without dead ends: 22438 [2022-12-14 06:48:16,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:48:16,523 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 2634 mSDsluCounter, 4663 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2634 SdHoareTripleChecker+Valid, 5793 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:48:16,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2634 Valid, 5793 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:48:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22438 states. [2022-12-14 06:48:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22438 to 7034. [2022-12-14 06:48:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7028 states have (on average 1.291548093340922) internal successors, (9077), 7032 states have internal predecessors, (9077), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 9082 transitions. [2022-12-14 06:48:17,758 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 9082 transitions. Word has length 443 [2022-12-14 06:48:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:48:17,758 INFO L495 AbstractCegarLoop]: Abstraction has 7034 states and 9082 transitions. [2022-12-14 06:48:17,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 9082 transitions. [2022-12-14 06:48:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-12-14 06:48:17,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:48:17,762 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:48:17,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 06:48:17,762 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:48:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:48:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1403476738, now seen corresponding path program 1 times [2022-12-14 06:48:17,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:48:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449568312] [2022-12-14 06:48:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:17,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:48:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-12-14 06:48:17,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:17,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449568312] [2022-12-14 06:48:17,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449568312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:48:17,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:48:17,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:48:17,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805329307] [2022-12-14 06:48:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:48:17,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:48:17,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:48:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:48:17,910 INFO L87 Difference]: Start difference. First operand 7034 states and 9082 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:48:21,533 INFO L93 Difference]: Finished difference Result 25474 states and 32883 transitions. [2022-12-14 06:48:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:48:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2022-12-14 06:48:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:48:21,552 INFO L225 Difference]: With dead ends: 25474 [2022-12-14 06:48:21,552 INFO L226 Difference]: Without dead ends: 18601 [2022-12-14 06:48:21,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:48:21,559 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1084 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:48:21,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 2092 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:48:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18601 states. [2022-12-14 06:48:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18601 to 7694. [2022-12-14 06:48:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7688 states have (on average 1.2868106139438085) internal successors, (9893), 7692 states have internal predecessors, (9893), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 9898 transitions. [2022-12-14 06:48:22,951 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 9898 transitions. Word has length 444 [2022-12-14 06:48:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:48:22,951 INFO L495 AbstractCegarLoop]: Abstraction has 7694 states and 9898 transitions. [2022-12-14 06:48:22,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 9898 transitions. [2022-12-14 06:48:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-12-14 06:48:22,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:48:22,955 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:48:22,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 06:48:22,955 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:48:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:48:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash -610715958, now seen corresponding path program 1 times [2022-12-14 06:48:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:48:22,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358552105] [2022-12-14 06:48:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:48:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2022-12-14 06:48:23,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:23,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358552105] [2022-12-14 06:48:23,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358552105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:48:23,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:48:23,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:48:23,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063058229] [2022-12-14 06:48:23,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:48:23,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:48:23,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:48:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:48:23,042 INFO L87 Difference]: Start difference. First operand 7694 states and 9898 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:48:24,920 INFO L93 Difference]: Finished difference Result 18032 states and 23289 transitions. [2022-12-14 06:48:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:48:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 482 [2022-12-14 06:48:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:48:24,931 INFO L225 Difference]: With dead ends: 18032 [2022-12-14 06:48:24,931 INFO L226 Difference]: Without dead ends: 10499 [2022-12-14 06:48:24,937 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 06:48:24,937 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 205 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:48:24,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 664 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:48:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2022-12-14 06:48:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10438. [2022-12-14 06:48:26,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 10432 states have (on average 1.2760736196319018) internal successors, (13312), 10436 states have internal predecessors, (13312), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 13317 transitions. [2022-12-14 06:48:26,749 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 13317 transitions. Word has length 482 [2022-12-14 06:48:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:48:26,749 INFO L495 AbstractCegarLoop]: Abstraction has 10438 states and 13317 transitions. [2022-12-14 06:48:26,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 13317 transitions. [2022-12-14 06:48:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-12-14 06:48:26,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:48:26,753 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:48:26,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 06:48:26,753 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:48:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:48:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash 897783482, now seen corresponding path program 1 times [2022-12-14 06:48:26,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:48:26,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638849523] [2022-12-14 06:48:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:26,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:48:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2022-12-14 06:48:26,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638849523] [2022-12-14 06:48:26,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638849523] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:48:26,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:48:26,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:48:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169351918] [2022-12-14 06:48:26,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:48:26,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:48:26,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:48:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:48:26,839 INFO L87 Difference]: Start difference. First operand 10438 states and 13317 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:48:28,249 INFO L93 Difference]: Finished difference Result 17801 states and 22778 transitions. [2022-12-14 06:48:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:48:28,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 483 [2022-12-14 06:48:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:48:28,257 INFO L225 Difference]: With dead ends: 17801 [2022-12-14 06:48:28,257 INFO L226 Difference]: Without dead ends: 7524 [2022-12-14 06:48:28,262 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 06:48:28,262 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 34 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:48:28,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 528 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:48:28,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7524 states. [2022-12-14 06:48:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7524 to 6710. [2022-12-14 06:48:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6710 states, 6704 states have (on average 1.2775954653937946) internal successors, (8565), 6708 states have internal predecessors, (8565), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6710 states to 6710 states and 8570 transitions. [2022-12-14 06:48:29,443 INFO L78 Accepts]: Start accepts. Automaton has 6710 states and 8570 transitions. Word has length 483 [2022-12-14 06:48:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:48:29,444 INFO L495 AbstractCegarLoop]: Abstraction has 6710 states and 8570 transitions. [2022-12-14 06:48:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:29,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6710 states and 8570 transitions. [2022-12-14 06:48:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-12-14 06:48:29,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:48:29,447 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:48:29,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 06:48:29,447 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:48:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:48:29,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1072115848, now seen corresponding path program 1 times [2022-12-14 06:48:29,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:48:29,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073817706] [2022-12-14 06:48:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:29,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:48:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2022-12-14 06:48:29,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:29,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073817706] [2022-12-14 06:48:29,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073817706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:48:29,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:48:29,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:48:29,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372850517] [2022-12-14 06:48:29,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:48:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:48:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:48:29,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:48:29,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:48:29,586 INFO L87 Difference]: Start difference. First operand 6710 states and 8570 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:48:30,724 INFO L93 Difference]: Finished difference Result 11901 states and 15255 transitions. [2022-12-14 06:48:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:48:30,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 484 [2022-12-14 06:48:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:48:30,730 INFO L225 Difference]: With dead ends: 11901 [2022-12-14 06:48:30,730 INFO L226 Difference]: Without dead ends: 5352 [2022-12-14 06:48:30,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:48:30,735 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 220 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:48:30,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 827 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:48:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2022-12-14 06:48:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 5313. [2022-12-14 06:48:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5313 states, 5307 states have (on average 1.259657056717543) internal successors, (6685), 5311 states have internal predecessors, (6685), 5 states have call successors, (5), 1 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 6690 transitions. [2022-12-14 06:48:31,737 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 6690 transitions. Word has length 484 [2022-12-14 06:48:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:48:31,738 INFO L495 AbstractCegarLoop]: Abstraction has 5313 states and 6690 transitions. [2022-12-14 06:48:31,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:48:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 6690 transitions. [2022-12-14 06:48:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-12-14 06:48:31,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:48:31,740 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:48:31,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 06:48:31,741 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:48:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:48:31,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1812148878, now seen corresponding path program 1 times [2022-12-14 06:48:31,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:48:31,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744798907] [2022-12-14 06:48:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:31,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:48:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 91 proven. 303 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-14 06:48:32,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:48:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744798907] [2022-12-14 06:48:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744798907] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:48:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211786219] [2022-12-14 06:48:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:48:32,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:48:32,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:48:32,763 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:48:32,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2be34897-ce86-4423-a8dd-f51ab8a53882/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:48:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:48:32,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 06:48:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:48:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 93 proven. 253 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-12-14 06:48:33,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:48:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 25 proven. 321 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-12-14 06:48:34,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211786219] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:48:34,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329742234] [2022-12-14 06:48:34,776 INFO L159 IcfgInterpreter]: Started Sifa with 161 locations of interest [2022-12-14 06:48:34,776 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:48:34,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:48:34,777 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:48:34,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs