./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/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_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/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_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/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 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 --- 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 03:12:09,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:12:09,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:12:09,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:12:09,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:12:09,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:12:09,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:12:09,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:12:09,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:12:09,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:12:09,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:12:09,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:12:09,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:12:09,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:12:09,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:12:09,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:12:09,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:12:09,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:12:09,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:12:09,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:12:09,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:12:09,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:12:09,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:12:09,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:12:09,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:12:09,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:12:09,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:12:09,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:12:09,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:12:09,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:12:09,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:12:09,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:12:09,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:12:09,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:12:09,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:12:09,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:12:09,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:12:09,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:12:09,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:12:09,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:12:09,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:12:09,778 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:12:09,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:12:09,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:12:09,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:12:09,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:12:09,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:12:09,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:12:09,794 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:12:09,794 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:12:09,799 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:12:09,799 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:12:09,799 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:12:09,799 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:12:09,800 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:12:09,800 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:12:09,800 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:12:09,800 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:12:09,800 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:12:09,800 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:12:09,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:12:09,801 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:12:09,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:12:09,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:12:09,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:12:09,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:12:09,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:12:09,803 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_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68ec02878969b041c7f7a32af94816f6626efeef23b5da7ea64f6e61f6ff6501 [2022-12-14 03:12:09,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:12:09,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:12:09,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:12:09,994 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:12:09,995 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:12:09,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c [2022-12-14 03:12:12,636 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:12:12,777 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:12:12,777 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c [2022-12-14 03:12:12,785 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/data/b044c292c/a5d0ca7fc9ad45d58b5e716fe2b330fb/FLAGe074be62a [2022-12-14 03:12:12,795 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/data/b044c292c/a5d0ca7fc9ad45d58b5e716fe2b330fb [2022-12-14 03:12:12,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:12:12,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:12:12,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:12:12,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:12:12,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:12:12,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:12" (1/1) ... [2022-12-14 03:12:12,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e46a9d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:12, skipping insertion in model container [2022-12-14 03:12:12,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:12" (1/1) ... [2022-12-14 03:12:12,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:12:12,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:12:12,949 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_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c[646,659] [2022-12-14 03:12:13,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:12:13,026 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:12:13,034 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_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/sv-benchmarks/c/systemc/mem_slave_tlm.2.cil.c[646,659] [2022-12-14 03:12:13,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:12:13,090 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:12:13,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13 WrapperNode [2022-12-14 03:12:13,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:12:13,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:12:13,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:12:13,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:12:13,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,133 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 851 [2022-12-14 03:12:13,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:12:13,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:12:13,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:12:13,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:12:13,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,159 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:12:13,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:12:13,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:12:13,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:12:13,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (1/1) ... [2022-12-14 03:12:13,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:12:13,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:13,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:12:13,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:12:13,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:12:13,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:12:13,216 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 03:12:13,216 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 03:12:13,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:12:13,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:12:13,280 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:12:13,282 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:12:13,848 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:12:13,947 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:12:13,947 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 03:12:13,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:13 BoogieIcfgContainer [2022-12-14 03:12:13,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:12:13,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:12:13,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:12:13,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:12:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:12:12" (1/3) ... [2022-12-14 03:12:13,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1bf2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:13, skipping insertion in model container [2022-12-14 03:12:13,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:13" (2/3) ... [2022-12-14 03:12:13,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1bf2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:13, skipping insertion in model container [2022-12-14 03:12:13,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:13" (3/3) ... [2022-12-14 03:12:13,955 INFO L112 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.2.cil.c [2022-12-14 03:12:13,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:12:13,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:12:14,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:12:14,012 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;@3db8d3e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:12:14,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:12:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 219 states have (on average 1.7808219178082192) internal successors, (390), 225 states have internal predecessors, (390), 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 03:12:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 03:12:14,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:14,024 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 03:12:14,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -391050094, now seen corresponding path program 1 times [2022-12-14 03:12:14,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:14,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800569642] [2022-12-14 03:12:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:14,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:14,196 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 03:12:14,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800569642] [2022-12-14 03:12:14,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800569642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:14,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:14,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654712519] [2022-12-14 03:12:14,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:14,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:14,227 INFO L87 Difference]: Start difference. First operand has 227 states, 219 states have (on average 1.7808219178082192) internal successors, (390), 225 states have internal predecessors, (390), 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 03:12:14,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:14,551 INFO L93 Difference]: Finished difference Result 612 states and 1070 transitions. [2022-12-14 03:12:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:14,553 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 03:12:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:14,564 INFO L225 Difference]: With dead ends: 612 [2022-12-14 03:12:14,564 INFO L226 Difference]: Without dead ends: 383 [2022-12-14 03:12:14,567 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 03:12:14,570 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 218 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 542 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 03:12:14,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 542 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:14,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-12-14 03:12:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 376. [2022-12-14 03:12:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.5243243243243243) internal successors, (564), 374 states have internal predecessors, (564), 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 03:12:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 569 transitions. [2022-12-14 03:12:14,621 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 569 transitions. Word has length 24 [2022-12-14 03:12:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:14,621 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 569 transitions. [2022-12-14 03:12:14,621 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 03:12:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 569 transitions. [2022-12-14 03:12:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 03:12:14,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:14,623 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] [2022-12-14 03:12:14,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:12:14,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1966824191, now seen corresponding path program 1 times [2022-12-14 03:12:14,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:14,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723718794] [2022-12-14 03:12:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:14,668 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 03:12:14,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723718794] [2022-12-14 03:12:14,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723718794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:14,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:14,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:14,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251446362] [2022-12-14 03:12:14,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:14,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:14,672 INFO L87 Difference]: Start difference. First operand 376 states and 569 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 03:12:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:14,811 INFO L93 Difference]: Finished difference Result 973 states and 1500 transitions. [2022-12-14 03:12:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:14,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 34 [2022-12-14 03:12:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:14,814 INFO L225 Difference]: With dead ends: 973 [2022-12-14 03:12:14,814 INFO L226 Difference]: Without dead ends: 607 [2022-12-14 03:12:14,815 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 03:12:14,816 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 263 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 725 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 03:12:14,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 725 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:14,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-12-14 03:12:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 600. [2022-12-14 03:12:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 594 states have (on average 1.5606060606060606) internal successors, (927), 598 states have internal predecessors, (927), 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 03:12:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 932 transitions. [2022-12-14 03:12:14,852 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 932 transitions. Word has length 34 [2022-12-14 03:12:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:14,853 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 932 transitions. [2022-12-14 03:12:14,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 03:12:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 932 transitions. [2022-12-14 03:12:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 03:12:14,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:14,855 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] [2022-12-14 03:12:14,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 03:12:14,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1057880958, now seen corresponding path program 1 times [2022-12-14 03:12:14,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848429242] [2022-12-14 03:12:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:14,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:14,917 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 03:12:14,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848429242] [2022-12-14 03:12:14,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848429242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:14,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:14,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:14,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108993615] [2022-12-14 03:12:14,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:14,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:14,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:14,919 INFO L87 Difference]: Start difference. First operand 600 states and 932 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 03:12:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:15,038 INFO L93 Difference]: Finished difference Result 1532 states and 2385 transitions. [2022-12-14 03:12:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 35 [2022-12-14 03:12:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:15,041 INFO L225 Difference]: With dead ends: 1532 [2022-12-14 03:12:15,041 INFO L226 Difference]: Without dead ends: 942 [2022-12-14 03:12:15,042 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 03:12:15,043 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 285 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 589 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 03:12:15,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 589 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-12-14 03:12:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 931. [2022-12-14 03:12:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 925 states have (on average 1.5567567567567568) internal successors, (1440), 929 states have internal predecessors, (1440), 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 03:12:15,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1445 transitions. [2022-12-14 03:12:15,073 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1445 transitions. Word has length 35 [2022-12-14 03:12:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:15,073 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1445 transitions. [2022-12-14 03:12:15,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 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 03:12:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1445 transitions. [2022-12-14 03:12:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 03:12:15,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:15,075 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 03:12:15,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 03:12:15,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1202630207, now seen corresponding path program 1 times [2022-12-14 03:12:15,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:15,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938268188] [2022-12-14 03:12:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:15,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:15,128 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 03:12:15,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:15,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938268188] [2022-12-14 03:12:15,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938268188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:15,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:15,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117540575] [2022-12-14 03:12:15,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:15,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:15,130 INFO L87 Difference]: Start difference. First operand 931 states and 1445 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 03:12:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:15,275 INFO L93 Difference]: Finished difference Result 2496 states and 3885 transitions. [2022-12-14 03:12:15,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:15,282 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 03:12:15,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:15,288 INFO L225 Difference]: With dead ends: 2496 [2022-12-14 03:12:15,288 INFO L226 Difference]: Without dead ends: 1575 [2022-12-14 03:12:15,290 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 03:12:15,291 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 335 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 753 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 03:12:15,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 753 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-12-14 03:12:15,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1473. [2022-12-14 03:12:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1467 states have (on average 1.5460122699386503) internal successors, (2268), 1471 states have internal predecessors, (2268), 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 03:12:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2273 transitions. [2022-12-14 03:12:15,363 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2273 transitions. Word has length 41 [2022-12-14 03:12:15,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:15,364 INFO L495 AbstractCegarLoop]: Abstraction has 1473 states and 2273 transitions. [2022-12-14 03:12:15,364 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 03:12:15,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2273 transitions. [2022-12-14 03:12:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 03:12:15,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:15,365 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 03:12:15,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 03:12:15,365 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:15,366 INFO L85 PathProgramCache]: Analyzing trace with hash 987026201, now seen corresponding path program 1 times [2022-12-14 03:12:15,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:15,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109693078] [2022-12-14 03:12:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:15,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:12:15,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:15,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109693078] [2022-12-14 03:12:15,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109693078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:15,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:15,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:15,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362943451] [2022-12-14 03:12:15,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:15,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:15,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:15,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:15,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:15,414 INFO L87 Difference]: Start difference. First operand 1473 states and 2273 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 03:12:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:15,630 INFO L93 Difference]: Finished difference Result 4194 states and 6460 transitions. [2022-12-14 03:12:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:15,630 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 03:12:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:15,641 INFO L225 Difference]: With dead ends: 4194 [2022-12-14 03:12:15,641 INFO L226 Difference]: Without dead ends: 2729 [2022-12-14 03:12:15,643 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 03:12:15,644 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 307 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 599 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 03:12:15,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 599 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2022-12-14 03:12:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2676. [2022-12-14 03:12:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2670 states have (on average 1.5191011235955056) internal successors, (4056), 2674 states have internal predecessors, (4056), 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 03:12:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4061 transitions. [2022-12-14 03:12:15,737 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4061 transitions. Word has length 48 [2022-12-14 03:12:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:15,738 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 4061 transitions. [2022-12-14 03:12:15,738 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 03:12:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4061 transitions. [2022-12-14 03:12:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 03:12:15,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:15,739 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 03:12:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 03:12:15,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1045395790, now seen corresponding path program 1 times [2022-12-14 03:12:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184383892] [2022-12-14 03:12:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:15,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:15,770 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 03:12:15,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:15,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184383892] [2022-12-14 03:12:15,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184383892] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:15,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:15,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139700943] [2022-12-14 03:12:15,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:15,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:15,772 INFO L87 Difference]: Start difference. First operand 2676 states and 4061 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 03:12:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:16,007 INFO L93 Difference]: Finished difference Result 6273 states and 9486 transitions. [2022-12-14 03:12:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:16,007 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 03:12:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:16,016 INFO L225 Difference]: With dead ends: 6273 [2022-12-14 03:12:16,016 INFO L226 Difference]: Without dead ends: 3606 [2022-12-14 03:12:16,019 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 03:12:16,019 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 294 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 512 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 03:12:16,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 512 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2022-12-14 03:12:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 3458. [2022-12-14 03:12:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3452 states have (on average 1.5011587485515643) internal successors, (5182), 3456 states have internal predecessors, (5182), 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 03:12:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 5187 transitions. [2022-12-14 03:12:16,179 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 5187 transitions. Word has length 48 [2022-12-14 03:12:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:16,180 INFO L495 AbstractCegarLoop]: Abstraction has 3458 states and 5187 transitions. [2022-12-14 03:12:16,180 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 03:12:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 5187 transitions. [2022-12-14 03:12:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 03:12:16,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:16,182 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] [2022-12-14 03:12:16,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 03:12:16,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:16,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2091014047, now seen corresponding path program 1 times [2022-12-14 03:12:16,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:16,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82367352] [2022-12-14 03:12:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:16,239 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 03:12:16,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82367352] [2022-12-14 03:12:16,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82367352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:16,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:16,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490826450] [2022-12-14 03:12:16,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:16,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:16,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:16,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:16,241 INFO L87 Difference]: Start difference. First operand 3458 states and 5187 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:12:16,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:16,687 INFO L93 Difference]: Finished difference Result 8352 states and 12575 transitions. [2022-12-14 03:12:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 53 [2022-12-14 03:12:16,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:16,699 INFO L225 Difference]: With dead ends: 8352 [2022-12-14 03:12:16,699 INFO L226 Difference]: Without dead ends: 4903 [2022-12-14 03:12:16,703 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 03:12:16,703 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 206 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 612 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 03:12:16,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 612 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4903 states. [2022-12-14 03:12:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4903 to 4820. [2022-12-14 03:12:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4820 states, 4814 states have (on average 1.4275031159119236) internal successors, (6872), 4818 states have internal predecessors, (6872), 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 03:12:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4820 states to 4820 states and 6877 transitions. [2022-12-14 03:12:16,866 INFO L78 Accepts]: Start accepts. Automaton has 4820 states and 6877 transitions. Word has length 53 [2022-12-14 03:12:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:16,866 INFO L495 AbstractCegarLoop]: Abstraction has 4820 states and 6877 transitions. [2022-12-14 03:12:16,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 03:12:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4820 states and 6877 transitions. [2022-12-14 03:12:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 03:12:16,868 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:16,868 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 03:12:16,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 03:12:16,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash -662637363, now seen corresponding path program 1 times [2022-12-14 03:12:16,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:16,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443158623] [2022-12-14 03:12:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:16,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:16,909 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 03:12:16,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:16,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443158623] [2022-12-14 03:12:16,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443158623] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:16,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:16,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:16,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516682130] [2022-12-14 03:12:16,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:16,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:16,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:16,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:16,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:16,911 INFO L87 Difference]: Start difference. First operand 4820 states and 6877 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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 03:12:17,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:17,157 INFO L93 Difference]: Finished difference Result 9496 states and 13576 transitions. [2022-12-14 03:12:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:17,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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 03:12:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:17,185 INFO L225 Difference]: With dead ends: 9496 [2022-12-14 03:12:17,185 INFO L226 Difference]: Without dead ends: 4685 [2022-12-14 03:12:17,190 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 03:12:17,191 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 279 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 326 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 03:12:17,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 326 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2022-12-14 03:12:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4685. [2022-12-14 03:12:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4679 states have (on average 1.4176106005556743) internal successors, (6633), 4683 states have internal predecessors, (6633), 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 03:12:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6638 transitions. [2022-12-14 03:12:17,397 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6638 transitions. Word has length 55 [2022-12-14 03:12:17,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:17,397 INFO L495 AbstractCegarLoop]: Abstraction has 4685 states and 6638 transitions. [2022-12-14 03:12:17,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 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 03:12:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6638 transitions. [2022-12-14 03:12:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 03:12:17,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:17,398 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] [2022-12-14 03:12:17,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 03:12:17,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -407299714, now seen corresponding path program 1 times [2022-12-14 03:12:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11419920] [2022-12-14 03:12:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:17,431 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 03:12:17,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11419920] [2022-12-14 03:12:17,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11419920] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:17,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:17,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859537398] [2022-12-14 03:12:17,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:17,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:17,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:17,433 INFO L87 Difference]: Start difference. First operand 4685 states and 6638 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 03:12:17,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:17,712 INFO L93 Difference]: Finished difference Result 9787 states and 14040 transitions. [2022-12-14 03:12:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:17,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 56 [2022-12-14 03:12:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:17,723 INFO L225 Difference]: With dead ends: 9787 [2022-12-14 03:12:17,723 INFO L226 Difference]: Without dead ends: 5111 [2022-12-14 03:12:17,728 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 03:12:17,728 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 256 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 735 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 03:12:17,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 735 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:17,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5111 states. [2022-12-14 03:12:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5111 to 3597. [2022-12-14 03:12:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3591 states have (on average 1.4374825953773323) internal successors, (5162), 3595 states have internal predecessors, (5162), 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 03:12:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 5167 transitions. [2022-12-14 03:12:17,873 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 5167 transitions. Word has length 56 [2022-12-14 03:12:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:17,873 INFO L495 AbstractCegarLoop]: Abstraction has 3597 states and 5167 transitions. [2022-12-14 03:12:17,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 03:12:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 5167 transitions. [2022-12-14 03:12:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 03:12:17,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:17,875 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 03:12:17,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 03:12:17,875 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:17,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1151360775, now seen corresponding path program 1 times [2022-12-14 03:12:17,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:17,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261817870] [2022-12-14 03:12:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:17,964 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 03:12:17,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:17,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261817870] [2022-12-14 03:12:17,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261817870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:17,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:17,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 03:12:17,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446347040] [2022-12-14 03:12:17,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:17,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:12:17,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:12:17,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:12:17,967 INFO L87 Difference]: Start difference. First operand 3597 states and 5167 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 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 03:12:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:19,297 INFO L93 Difference]: Finished difference Result 16510 states and 23606 transitions. [2022-12-14 03:12:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 03:12:19,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 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 03:12:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:19,328 INFO L225 Difference]: With dead ends: 16510 [2022-12-14 03:12:19,328 INFO L226 Difference]: Without dead ends: 13010 [2022-12-14 03:12:19,335 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 03:12:19,336 INFO L413 NwaCegarLoop]: 1176 mSDtfsCounter, 2035 mSDsluCounter, 4367 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 5543 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:19,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2035 Valid, 5543 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:12:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13010 states. [2022-12-14 03:12:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13010 to 4371. [2022-12-14 03:12:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4365 states have (on average 1.43184421534937) internal successors, (6250), 4369 states have internal predecessors, (6250), 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 03:12:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 6255 transitions. [2022-12-14 03:12:19,611 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 6255 transitions. Word has length 58 [2022-12-14 03:12:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:19,612 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 6255 transitions. [2022-12-14 03:12:19,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 6 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 03:12:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 6255 transitions. [2022-12-14 03:12:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 03:12:19,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:19,613 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] [2022-12-14 03:12:19,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 03:12:19,613 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1833186076, now seen corresponding path program 1 times [2022-12-14 03:12:19,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:19,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228008330] [2022-12-14 03:12:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:19,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:19,706 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 03:12:19,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:19,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228008330] [2022-12-14 03:12:19,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228008330] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:19,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:19,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 03:12:19,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106661372] [2022-12-14 03:12:19,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:19,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:12:19,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:19,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:12:19,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:12:19,708 INFO L87 Difference]: Start difference. First operand 4371 states and 6255 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 03:12:22,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:22,016 INFO L93 Difference]: Finished difference Result 29236 states and 41750 transitions. [2022-12-14 03:12:22,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 03:12:22,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 59 [2022-12-14 03:12:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:22,051 INFO L225 Difference]: With dead ends: 29236 [2022-12-14 03:12:22,051 INFO L226 Difference]: Without dead ends: 24962 [2022-12-14 03:12:22,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-12-14 03:12:22,058 INFO L413 NwaCegarLoop]: 1400 mSDtfsCounter, 3183 mSDsluCounter, 5080 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3183 SdHoareTripleChecker+Valid, 6480 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:22,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3183 Valid, 6480 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:12:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24962 states. [2022-12-14 03:12:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24962 to 4655. [2022-12-14 03:12:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4649 states have (on average 1.4226715422671543) internal successors, (6614), 4653 states have internal predecessors, (6614), 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 03:12:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 6619 transitions. [2022-12-14 03:12:22,469 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 6619 transitions. Word has length 59 [2022-12-14 03:12:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:22,469 INFO L495 AbstractCegarLoop]: Abstraction has 4655 states and 6619 transitions. [2022-12-14 03:12:22,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 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 03:12:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 6619 transitions. [2022-12-14 03:12:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 03:12:22,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:22,471 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 03:12:22,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 03:12:22,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1150087073, now seen corresponding path program 1 times [2022-12-14 03:12:22,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320888332] [2022-12-14 03:12:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:22,492 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 03:12:22,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:22,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320888332] [2022-12-14 03:12:22,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320888332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:22,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:22,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:12:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571059065] [2022-12-14 03:12:22,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:22,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:22,494 INFO L87 Difference]: Start difference. First operand 4655 states and 6619 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 03:12:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:22,948 INFO L93 Difference]: Finished difference Result 9803 states and 13895 transitions. [2022-12-14 03:12:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:22,949 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 03:12:22,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:22,954 INFO L225 Difference]: With dead ends: 9803 [2022-12-14 03:12:22,954 INFO L226 Difference]: Without dead ends: 5172 [2022-12-14 03:12:22,957 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 03:12:22,958 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 122 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 616 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 03:12:22,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 616 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2022-12-14 03:12:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4706. [2022-12-14 03:12:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4700 states have (on average 1.4195744680851063) internal successors, (6672), 4704 states have internal predecessors, (6672), 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 03:12:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 6677 transitions. [2022-12-14 03:12:23,316 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 6677 transitions. Word has length 72 [2022-12-14 03:12:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:23,317 INFO L495 AbstractCegarLoop]: Abstraction has 4706 states and 6677 transitions. [2022-12-14 03:12:23,317 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 03:12:23,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 6677 transitions. [2022-12-14 03:12:23,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 03:12:23,318 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:23,318 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 03:12:23,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 03:12:23,318 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1549121940, now seen corresponding path program 1 times [2022-12-14 03:12:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:23,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716963517] [2022-12-14 03:12:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:23,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:23,358 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 03:12:23,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:23,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716963517] [2022-12-14 03:12:23,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716963517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:23,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:23,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:23,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781334667] [2022-12-14 03:12:23,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:23,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:23,360 INFO L87 Difference]: Start difference. First operand 4706 states and 6677 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 03:12:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:24,046 INFO L93 Difference]: Finished difference Result 10451 states and 14874 transitions. [2022-12-14 03:12:24,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 03:12:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:24,052 INFO L225 Difference]: With dead ends: 10451 [2022-12-14 03:12:24,052 INFO L226 Difference]: Without dead ends: 5822 [2022-12-14 03:12:24,055 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 03:12:24,055 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 147 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:24,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 703 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2022-12-14 03:12:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 4975. [2022-12-14 03:12:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4969 states have (on average 1.4155765747635338) internal successors, (7034), 4973 states have internal predecessors, (7034), 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 03:12:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 7039 transitions. [2022-12-14 03:12:24,411 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 7039 transitions. Word has length 83 [2022-12-14 03:12:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:24,412 INFO L495 AbstractCegarLoop]: Abstraction has 4975 states and 7039 transitions. [2022-12-14 03:12:24,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 03:12:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 7039 transitions. [2022-12-14 03:12:24,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-12-14 03:12:24,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:24,413 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 03:12:24,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 03:12:24,413 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2125277367, now seen corresponding path program 1 times [2022-12-14 03:12:24,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:24,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601010791] [2022-12-14 03:12:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:24,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:24,447 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 03:12:24,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:24,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601010791] [2022-12-14 03:12:24,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601010791] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:24,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:24,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:12:24,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652295716] [2022-12-14 03:12:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:24,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:24,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:24,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:12:24,449 INFO L87 Difference]: Start difference. First operand 4975 states and 7039 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 03:12:24,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:24,784 INFO L93 Difference]: Finished difference Result 7303 states and 10408 transitions. [2022-12-14 03:12:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:24,785 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 03:12:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:24,787 INFO L225 Difference]: With dead ends: 7303 [2022-12-14 03:12:24,787 INFO L226 Difference]: Without dead ends: 2296 [2022-12-14 03:12:24,791 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 03:12:24,791 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 300 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:24,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 448 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2022-12-14 03:12:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2260. [2022-12-14 03:12:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2254 states have (on average 1.3673469387755102) internal successors, (3082), 2258 states have internal predecessors, (3082), 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 03:12:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3087 transitions. [2022-12-14 03:12:24,959 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3087 transitions. Word has length 89 [2022-12-14 03:12:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:24,959 INFO L495 AbstractCegarLoop]: Abstraction has 2260 states and 3087 transitions. [2022-12-14 03:12:24,959 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 03:12:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3087 transitions. [2022-12-14 03:12:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 03:12:24,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:24,960 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 03:12:24,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 03:12:24,960 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash 315165098, now seen corresponding path program 1 times [2022-12-14 03:12:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349180253] [2022-12-14 03:12:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:25,001 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 03:12:25,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:25,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349180253] [2022-12-14 03:12:25,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349180253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:25,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:12:25,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:12:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36702135] [2022-12-14 03:12:25,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:25,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:12:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:25,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:12:25,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:12:25,002 INFO L87 Difference]: Start difference. First operand 2260 states and 3087 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 03:12:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:26,006 INFO L93 Difference]: Finished difference Result 8662 states and 11908 transitions. [2022-12-14 03:12:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:12:26,007 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 03:12:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:26,012 INFO L225 Difference]: With dead ends: 8662 [2022-12-14 03:12:26,013 INFO L226 Difference]: Without dead ends: 6531 [2022-12-14 03:12:26,015 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 03:12:26,016 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 1390 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:26,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1390 Valid, 2646 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6531 states. [2022-12-14 03:12:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6531 to 2262. [2022-12-14 03:12:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.3643617021276595) internal successors, (3078), 2260 states have internal predecessors, (3078), 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 03:12:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3083 transitions. [2022-12-14 03:12:26,271 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3083 transitions. Word has length 93 [2022-12-14 03:12:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:26,271 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 3083 transitions. [2022-12-14 03:12:26,271 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 03:12:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3083 transitions. [2022-12-14 03:12:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 03:12:26,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:26,272 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 03:12:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 03:12:26,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1224475387, now seen corresponding path program 1 times [2022-12-14 03:12:26,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412496306] [2022-12-14 03:12:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:26,333 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 03:12:26,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:26,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412496306] [2022-12-14 03:12:26,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412496306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:26,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678204713] [2022-12-14 03:12:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:26,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:26,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:26,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:26,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:12:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:26,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:26,527 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 03:12:26,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:26,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678204713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:26,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:26,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 03:12:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810796952] [2022-12-14 03:12:26,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:26,530 INFO L87 Difference]: Start difference. First operand 2262 states and 3083 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 03:12:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:26,946 INFO L93 Difference]: Finished difference Result 2283 states and 3102 transitions. [2022-12-14 03:12:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:26,947 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 03:12:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:26,949 INFO L225 Difference]: With dead ends: 2283 [2022-12-14 03:12:26,949 INFO L226 Difference]: Without dead ends: 2279 [2022-12-14 03:12:26,949 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 03:12:26,950 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 201 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 623 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 03:12:26,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 623 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:26,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-12-14 03:12:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2262. [2022-12-14 03:12:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.3585992907801419) internal successors, (3065), 2260 states have internal predecessors, (3065), 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 03:12:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3070 transitions. [2022-12-14 03:12:27,146 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3070 transitions. Word has length 95 [2022-12-14 03:12:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:27,146 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 3070 transitions. [2022-12-14 03:12:27,146 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 03:12:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3070 transitions. [2022-12-14 03:12:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 03:12:27,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:27,148 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] [2022-12-14 03:12:27,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:12:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 03:12:27,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1031474593, now seen corresponding path program 1 times [2022-12-14 03:12:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383060138] [2022-12-14 03:12:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:27,407 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 03:12:27,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:27,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383060138] [2022-12-14 03:12:27,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383060138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:27,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64622361] [2022-12-14 03:12:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:27,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:27,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:27,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:27,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:12:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:27,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:27,568 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 03:12:27,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64622361] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:27,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:27,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 03:12:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990132705] [2022-12-14 03:12:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:27,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:27,570 INFO L87 Difference]: Start difference. First operand 2262 states and 3070 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 03:12:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:27,899 INFO L93 Difference]: Finished difference Result 4373 states and 5972 transitions. [2022-12-14 03:12:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:27,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 146 [2022-12-14 03:12:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:27,902 INFO L225 Difference]: With dead ends: 4373 [2022-12-14 03:12:27,902 INFO L226 Difference]: Without dead ends: 2262 [2022-12-14 03:12:27,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 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 03:12:27,904 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 230 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:12:27,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 333 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-12-14 03:12:28,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2262. [2022-12-14 03:12:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.3275709219858156) internal successors, (2995), 2260 states have internal predecessors, (2995), 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 03:12:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3000 transitions. [2022-12-14 03:12:28,111 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3000 transitions. Word has length 146 [2022-12-14 03:12:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:28,111 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 3000 transitions. [2022-12-14 03:12:28,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 03:12:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3000 transitions. [2022-12-14 03:12:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 03:12:28,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:28,113 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] [2022-12-14 03:12:28,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 03:12:28,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 03:12:28,313 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2137226991, now seen corresponding path program 1 times [2022-12-14 03:12:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127800705] [2022-12-14 03:12:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:28,419 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 03:12:28,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127800705] [2022-12-14 03:12:28,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127800705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597801363] [2022-12-14 03:12:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:28,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:28,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:28,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:28,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:12:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:28,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:28,558 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 03:12:28,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:28,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597801363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:28,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:28,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 03:12:28,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534194094] [2022-12-14 03:12:28,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:28,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:28,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:28,560 INFO L87 Difference]: Start difference. First operand 2262 states and 3000 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 03:12:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:28,861 INFO L93 Difference]: Finished difference Result 4373 states and 5832 transitions. [2022-12-14 03:12:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 149 [2022-12-14 03:12:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:28,863 INFO L225 Difference]: With dead ends: 4373 [2022-12-14 03:12:28,863 INFO L226 Difference]: Without dead ends: 2262 [2022-12-14 03:12:28,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 150 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 03:12:28,865 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 240 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 305 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 03:12:28,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 305 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:12:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-12-14 03:12:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2262. [2022-12-14 03:12:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2256 states have (on average 1.2965425531914894) internal successors, (2925), 2260 states have internal predecessors, (2925), 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 03:12:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 2930 transitions. [2022-12-14 03:12:29,072 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 2930 transitions. Word has length 149 [2022-12-14 03:12:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:29,072 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 2930 transitions. [2022-12-14 03:12:29,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 03:12:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 2930 transitions. [2022-12-14 03:12:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 03:12:29,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:29,074 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] [2022-12-14 03:12:29,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:12:29,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:29,275 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:29,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1863153714, now seen corresponding path program 1 times [2022-12-14 03:12:29,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:29,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953614586] [2022-12-14 03:12:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:29,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:29,371 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 03:12:29,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953614586] [2022-12-14 03:12:29,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953614586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440110068] [2022-12-14 03:12:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:29,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:29,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:29,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:29,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:12:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:12:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:29,486 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 03:12:29,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:12:29,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440110068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:12:29,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:12:29,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 03:12:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784177573] [2022-12-14 03:12:29,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:12:29,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:12:29,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:12:29,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:12:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:12:29,487 INFO L87 Difference]: Start difference. First operand 2262 states and 2930 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 03:12:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:12:30,040 INFO L93 Difference]: Finished difference Result 5024 states and 6632 transitions. [2022-12-14 03:12:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:12:30,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 150 [2022-12-14 03:12:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:12:30,044 INFO L225 Difference]: With dead ends: 5024 [2022-12-14 03:12:30,044 INFO L226 Difference]: Without dead ends: 2913 [2022-12-14 03:12:30,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 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 03:12:30,045 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 173 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 536 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 03:12:30,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 536 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:12:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2022-12-14 03:12:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2750. [2022-12-14 03:12:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2744 states have (on average 1.2744169096209912) internal successors, (3497), 2748 states have internal predecessors, (3497), 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 03:12:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 3502 transitions. [2022-12-14 03:12:30,315 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 3502 transitions. Word has length 150 [2022-12-14 03:12:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:12:30,315 INFO L495 AbstractCegarLoop]: Abstraction has 2750 states and 3502 transitions. [2022-12-14 03:12:30,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 03:12:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 3502 transitions. [2022-12-14 03:12:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 03:12:30,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:12:30,316 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] [2022-12-14 03:12:30,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:12:30,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:30,518 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:12:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:12:30,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1580933275, now seen corresponding path program 1 times [2022-12-14 03:12:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:12:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94150980] [2022-12-14 03:12:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:12:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:30,694 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 03:12:30,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:12:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94150980] [2022-12-14 03:12:30,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94150980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:12:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692420670] [2022-12-14 03:12:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:12:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:12:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:12:30,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:12:30,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:12:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:12:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 03:12:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:12:30,984 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 03:12:30,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:12:31,157 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 03:12:31,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692420670] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:12:31,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999457348] [2022-12-14 03:12:31,175 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-12-14 03:12:31,176 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:12:31,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:12:31,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:12:31,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:13:00,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:13:35,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1999457348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:13:35,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:13:35,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [9, 9, 9] total 54 [2022-12-14 03:13:35,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479743469] [2022-12-14 03:13:35,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:13:35,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 03:13:35,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:13:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 03:13:35,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2677, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 03:13:35,401 INFO L87 Difference]: Start difference. First operand 2750 states and 3502 transitions. Second operand has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 45 states have internal predecessors, (111), 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 03:13:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:13:58,450 INFO L93 Difference]: Finished difference Result 5643 states and 7175 transitions. [2022-12-14 03:13:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 03:13:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 45 states have internal predecessors, (111), 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 03:13:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:13:58,454 INFO L225 Difference]: With dead ends: 5643 [2022-12-14 03:13:58,454 INFO L226 Difference]: Without dead ends: 2885 [2022-12-14 03:13:58,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 375 SyntacticMatches, 37 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=262, Invalid=3770, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 03:13:58,461 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 96 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 9926 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 9962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 9926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-12-14 03:13:58,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1313 Invalid, 9962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 9926 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2022-12-14 03:13:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2022-12-14 03:13:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2880. [2022-12-14 03:13:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 2874 states have (on average 1.2637439109255393) internal successors, (3632), 2878 states have internal predecessors, (3632), 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 03:13:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3637 transitions. [2022-12-14 03:13:58,815 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3637 transitions. Word has length 152 [2022-12-14 03:13:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:13:58,816 INFO L495 AbstractCegarLoop]: Abstraction has 2880 states and 3637 transitions. [2022-12-14 03:13:58,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 45 states have internal predecessors, (111), 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 03:13:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3637 transitions. [2022-12-14 03:13:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 03:13:58,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:13:58,817 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:13:58,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:13:59,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:13:59,019 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:13:59,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:13:59,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1133948024, now seen corresponding path program 1 times [2022-12-14 03:13:59,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:13:59,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125516693] [2022-12-14 03:13:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:13:59,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:13:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:13:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 03:13:59,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:13:59,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125516693] [2022-12-14 03:13:59,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125516693] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:13:59,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130781874] [2022-12-14 03:13:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:13:59,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:13:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:13:59,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:13:59,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:13:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:13:59,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 03:13:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:13:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 03:13:59,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:13:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 03:13:59,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130781874] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:13:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491815932] [2022-12-14 03:13:59,640 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-12-14 03:13:59,640 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:13:59,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:13:59,641 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:13:59,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:14:16,646 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:14:41,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [491815932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:14:41,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:14:41,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [9, 9, 9] total 64 [2022-12-14 03:14:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339369409] [2022-12-14 03:14:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:14:41,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 03:14:41,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:14:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 03:14:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3799, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 03:14:41,150 INFO L87 Difference]: Start difference. First operand 2880 states and 3637 transitions. Second operand has 56 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 55 states have internal predecessors, (110), 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 03:15:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:10,164 INFO L93 Difference]: Finished difference Result 5653 states and 7169 transitions. [2022-12-14 03:15:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 03:15:10,164 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 55 states have internal predecessors, (110), 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 166 [2022-12-14 03:15:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:10,167 INFO L225 Difference]: With dead ends: 5653 [2022-12-14 03:15:10,167 INFO L226 Difference]: Without dead ends: 3048 [2022-12-14 03:15:10,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 425 SyntacticMatches, 19 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2729 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=492, Invalid=7880, Unknown=0, NotChecked=0, Total=8372 [2022-12-14 03:15:10,171 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 149 mSDsluCounter, 1720 mSDsCounter, 0 mSdLazyCounter, 12569 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 12633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 12569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:10,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 2003 Invalid, 12633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 12569 Invalid, 0 Unknown, 0 Unchecked, 15.8s Time] [2022-12-14 03:15:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2022-12-14 03:15:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 3028. [2022-12-14 03:15:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3022 states have (on average 1.2524818001323628) internal successors, (3785), 3026 states have internal predecessors, (3785), 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 03:15:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 3790 transitions. [2022-12-14 03:15:10,563 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 3790 transitions. Word has length 166 [2022-12-14 03:15:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:10,563 INFO L495 AbstractCegarLoop]: Abstraction has 3028 states and 3790 transitions. [2022-12-14 03:15:10,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 55 states have internal predecessors, (110), 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 03:15:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 3790 transitions. [2022-12-14 03:15:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 03:15:10,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:10,565 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 03:15:10,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 03:15:10,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 03:15:10,767 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash 656192641, now seen corresponding path program 1 times [2022-12-14 03:15:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:10,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772548395] [2022-12-14 03:15:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:10,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 03:15:10,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:10,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772548395] [2022-12-14 03:15:10,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772548395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:10,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:10,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:15:10,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830147003] [2022-12-14 03:15:10,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:10,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:15:10,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:15:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:10,879 INFO L87 Difference]: Start difference. First operand 3028 states and 3790 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 03:15:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:11,757 INFO L93 Difference]: Finished difference Result 6336 states and 8008 transitions. [2022-12-14 03:15:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:15:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 172 [2022-12-14 03:15:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:11,761 INFO L225 Difference]: With dead ends: 6336 [2022-12-14 03:15:11,761 INFO L226 Difference]: Without dead ends: 3498 [2022-12-14 03:15:11,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:11,764 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 313 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:11,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 877 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2022-12-14 03:15:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3194. [2022-12-14 03:15:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3188 states have (on average 1.2418444165621079) internal successors, (3959), 3192 states have internal predecessors, (3959), 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 03:15:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 3964 transitions. [2022-12-14 03:15:12,183 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 3964 transitions. Word has length 172 [2022-12-14 03:15:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:12,184 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 3964 transitions. [2022-12-14 03:15:12,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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 03:15:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 3964 transitions. [2022-12-14 03:15:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 03:15:12,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:12,185 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:15:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 03:15:12,185 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2119161746, now seen corresponding path program 1 times [2022-12-14 03:15:12,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:12,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360169091] [2022-12-14 03:15:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 03:15:12,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360169091] [2022-12-14 03:15:12,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360169091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:12,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:12,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:15:12,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121829105] [2022-12-14 03:15:12,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:15:12,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:12,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:15:12,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:15:12,283 INFO L87 Difference]: Start difference. First operand 3194 states and 3964 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 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 03:15:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:12,946 INFO L93 Difference]: Finished difference Result 6915 states and 8684 transitions. [2022-12-14 03:15:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 03:15:12,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 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 173 [2022-12-14 03:15:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:12,950 INFO L225 Difference]: With dead ends: 6915 [2022-12-14 03:15:12,950 INFO L226 Difference]: Without dead ends: 3893 [2022-12-14 03:15:12,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:15:12,953 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 369 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:12,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 1022 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2022-12-14 03:15:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3359. [2022-12-14 03:15:13,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3353 states have (on average 1.2430659111243663) internal successors, (4168), 3357 states have internal predecessors, (4168), 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 03:15:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4173 transitions. [2022-12-14 03:15:13,401 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4173 transitions. Word has length 173 [2022-12-14 03:15:13,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:13,402 INFO L495 AbstractCegarLoop]: Abstraction has 3359 states and 4173 transitions. [2022-12-14 03:15:13,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 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 03:15:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4173 transitions. [2022-12-14 03:15:13,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 03:15:13,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:13,403 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:15:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 03:15:13,403 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1033849184, now seen corresponding path program 1 times [2022-12-14 03:15:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139969454] [2022-12-14 03:15:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 03:15:13,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:13,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139969454] [2022-12-14 03:15:13,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139969454] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:13,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:13,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:15:13,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015884844] [2022-12-14 03:15:13,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:13,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:13,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:13,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:13,435 INFO L87 Difference]: Start difference. First operand 3359 states and 4173 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 03:15:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:14,123 INFO L93 Difference]: Finished difference Result 7662 states and 9634 transitions. [2022-12-14 03:15:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 174 [2022-12-14 03:15:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:14,128 INFO L225 Difference]: With dead ends: 7662 [2022-12-14 03:15:14,128 INFO L226 Difference]: Without dead ends: 4623 [2022-12-14 03:15:14,131 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 03:15:14,131 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 205 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:14,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 652 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4623 states. [2022-12-14 03:15:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4623 to 4564. [2022-12-14 03:15:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4558 states have (on average 1.2395787626151822) internal successors, (5650), 4562 states have internal predecessors, (5650), 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 03:15:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 5655 transitions. [2022-12-14 03:15:14,724 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 5655 transitions. Word has length 174 [2022-12-14 03:15:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:14,724 INFO L495 AbstractCegarLoop]: Abstraction has 4564 states and 5655 transitions. [2022-12-14 03:15:14,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 03:15:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 5655 transitions. [2022-12-14 03:15:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-12-14 03:15:14,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:14,725 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] [2022-12-14 03:15:14,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 03:15:14,726 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1289176711, now seen corresponding path program 1 times [2022-12-14 03:15:14,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709272226] [2022-12-14 03:15:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:14,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 98 proven. 99 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 03:15:14,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:14,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709272226] [2022-12-14 03:15:14,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709272226] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:14,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534736493] [2022-12-14 03:15:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:14,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:14,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:14,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:15:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:14,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 03:15:14,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 03:15:15,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:15,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534736493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:15,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:15:15,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2022-12-14 03:15:15,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272621879] [2022-12-14 03:15:15,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:15,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:15:15,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:15:15,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 03:15:15,116 INFO L87 Difference]: Start difference. First operand 4564 states and 5655 transitions. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 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 03:15:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:17,003 INFO L93 Difference]: Finished difference Result 14095 states and 17590 transitions. [2022-12-14 03:15:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 03:15:17,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 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 247 [2022-12-14 03:15:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:17,012 INFO L225 Difference]: With dead ends: 14095 [2022-12-14 03:15:17,012 INFO L226 Difference]: Without dead ends: 9695 [2022-12-14 03:15:17,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-12-14 03:15:17,017 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 1307 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:17,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1307 Valid, 2230 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9695 states. [2022-12-14 03:15:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9695 to 6965. [2022-12-14 03:15:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6965 states, 6959 states have (on average 1.2575082626814198) internal successors, (8751), 6963 states have internal predecessors, (8751), 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 03:15:17,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6965 states to 6965 states and 8756 transitions. [2022-12-14 03:15:17,925 INFO L78 Accepts]: Start accepts. Automaton has 6965 states and 8756 transitions. Word has length 247 [2022-12-14 03:15:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:17,926 INFO L495 AbstractCegarLoop]: Abstraction has 6965 states and 8756 transitions. [2022-12-14 03:15:17,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 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 03:15:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6965 states and 8756 transitions. [2022-12-14 03:15:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-12-14 03:15:17,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:17,927 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 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] [2022-12-14 03:15:17,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 03:15:18,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 03:15:18,129 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash -772164697, now seen corresponding path program 1 times [2022-12-14 03:15:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:18,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248310293] [2022-12-14 03:15:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 03:15:18,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:18,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248310293] [2022-12-14 03:15:18,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248310293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:18,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:18,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 03:15:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617480171] [2022-12-14 03:15:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:18,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:15:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:15:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:15:18,255 INFO L87 Difference]: Start difference. First operand 6965 states and 8756 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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 03:15:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:22,904 INFO L93 Difference]: Finished difference Result 35172 states and 44115 transitions. [2022-12-14 03:15:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 03:15:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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 248 [2022-12-14 03:15:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:22,935 INFO L225 Difference]: With dead ends: 35172 [2022-12-14 03:15:22,935 INFO L226 Difference]: Without dead ends: 28436 [2022-12-14 03:15:22,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-12-14 03:15:22,944 INFO L413 NwaCegarLoop]: 1046 mSDtfsCounter, 2921 mSDsluCounter, 4097 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2921 SdHoareTripleChecker+Valid, 5143 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:22,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2921 Valid, 5143 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 03:15:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28436 states. [2022-12-14 03:15:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28436 to 7398. [2022-12-14 03:15:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7398 states, 7392 states have (on average 1.2571699134199135) internal successors, (9293), 7396 states have internal predecessors, (9293), 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 03:15:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7398 states to 7398 states and 9298 transitions. [2022-12-14 03:15:24,167 INFO L78 Accepts]: Start accepts. Automaton has 7398 states and 9298 transitions. Word has length 248 [2022-12-14 03:15:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:24,168 INFO L495 AbstractCegarLoop]: Abstraction has 7398 states and 9298 transitions. [2022-12-14 03:15:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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 03:15:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7398 states and 9298 transitions. [2022-12-14 03:15:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-12-14 03:15:24,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:24,169 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:24,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 03:15:24,169 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:24,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1961528708, now seen corresponding path program 1 times [2022-12-14 03:15:24,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:24,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128656790] [2022-12-14 03:15:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:24,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-14 03:15:24,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128656790] [2022-12-14 03:15:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128656790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:24,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:24,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:15:24,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976352886] [2022-12-14 03:15:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:24,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:24,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:24,266 INFO L87 Difference]: Start difference. First operand 7398 states and 9298 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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 03:15:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:27,800 INFO L93 Difference]: Finished difference Result 24997 states and 31295 transitions. [2022-12-14 03:15:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:15:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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 03:15:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:27,816 INFO L225 Difference]: With dead ends: 24997 [2022-12-14 03:15:27,816 INFO L226 Difference]: Without dead ends: 17828 [2022-12-14 03:15:27,820 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 03:15:27,821 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 1075 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:27,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1913 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:15:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17828 states. [2022-12-14 03:15:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17828 to 7930. [2022-12-14 03:15:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7930 states, 7924 states have (on average 1.2537859666834932) internal successors, (9935), 7928 states have internal predecessors, (9935), 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 03:15:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7930 states to 7930 states and 9940 transitions. [2022-12-14 03:15:29,108 INFO L78 Accepts]: Start accepts. Automaton has 7930 states and 9940 transitions. Word has length 249 [2022-12-14 03:15:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:29,108 INFO L495 AbstractCegarLoop]: Abstraction has 7930 states and 9940 transitions. [2022-12-14 03:15:29,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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 03:15:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7930 states and 9940 transitions. [2022-12-14 03:15:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-12-14 03:15:29,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:29,110 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:29,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 03:15:29,110 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash -276111199, now seen corresponding path program 1 times [2022-12-14 03:15:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669854585] [2022-12-14 03:15:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:29,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 37 proven. 137 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 03:15:29,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669854585] [2022-12-14 03:15:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669854585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:29,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492775658] [2022-12-14 03:15:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:29,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:29,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:29,774 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:29,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c450ca64-7570-4bf6-895f-d6a6ddb5b07a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 03:15:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 03:15:29,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 39 proven. 119 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 03:15:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 15 proven. 143 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 03:15:30,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492775658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:30,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930742866] [2022-12-14 03:15:31,002 INFO L159 IcfgInterpreter]: Started Sifa with 159 locations of interest [2022-12-14 03:15:31,002 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:31,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:31,002 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:31,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs