./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI --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 dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- 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-5e519f3 [2022-11-03 02:16:27,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:16:27,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:16:27,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:16:27,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:16:27,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:16:27,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:16:27,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:16:27,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:16:27,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:16:27,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:16:27,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:16:27,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:16:27,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:16:27,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:16:27,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:16:27,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:16:27,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:16:27,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:16:27,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:16:27,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:16:27,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:16:27,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:16:27,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:16:27,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:16:27,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:16:27,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:16:27,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:16:27,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:16:27,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:16:27,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:16:27,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:16:27,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:16:27,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:16:27,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:16:27,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:16:27,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:16:27,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:16:27,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:16:27,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:16:27,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:16:27,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:16:27,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:16:27,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:16:27,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:16:27,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:16:27,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:16:27,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:16:27,941 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:16:27,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:16:27,941 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:16:27,941 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:16:27,942 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:16:27,942 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:16:27,943 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:16:27,943 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:16:27,943 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:16:27,943 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:16:27,943 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:16:27,944 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:16:27,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:16:27,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:16:27,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:16:27,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:16:27,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:16:27,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:16:27,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:16:27,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:16:27,947 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:16:27,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:16:27,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:16:27,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:16:27,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:16:27,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:16:27,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:16:27,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:16:27,949 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:16:27,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:16:27,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:16:27,950 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:16:27,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:16:27,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:16:27,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:16:27,950 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_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2022-11-03 02:16:28,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:16:28,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:16:28,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:16:28,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:16:28,252 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:16:28,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-03 02:16:28,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/data/19d3e33b1/a5ce26c5b4884874b655b10f3cb3da47/FLAG9acb3cfcc [2022-11-03 02:16:28,864 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:16:28,865 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-03 02:16:28,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/data/19d3e33b1/a5ce26c5b4884874b655b10f3cb3da47/FLAG9acb3cfcc [2022-11-03 02:16:29,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/data/19d3e33b1/a5ce26c5b4884874b655b10f3cb3da47 [2022-11-03 02:16:29,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:16:29,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:16:29,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:16:29,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:16:29,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:16:29,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:29,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236646c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29, skipping insertion in model container [2022-11-03 02:16:29,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:29,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:16:29,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:16:29,473 WARN L230 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_611df1fb-204d-4c34-beaf-77b11897074c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-03 02:16:29,565 WARN L230 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_611df1fb-204d-4c34-beaf-77b11897074c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-03 02:16:29,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:16:29,725 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:16:29,746 WARN L230 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_611df1fb-204d-4c34-beaf-77b11897074c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-11-03 02:16:29,775 WARN L230 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_611df1fb-204d-4c34-beaf-77b11897074c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-11-03 02:16:29,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:16:29,873 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:16:29,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29 WrapperNode [2022-11-03 02:16:29,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:16:29,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:16:29,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:16:29,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:16:29,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:29,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:29,961 INFO L138 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 813 [2022-11-03 02:16:29,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:16:29,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:16:29,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:16:29,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:16:29,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:29,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:29,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:29,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:30,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:30,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:30,046 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:30,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:30,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:16:30,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:16:30,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:16:30,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:16:30,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (1/1) ... [2022-11-03 02:16:30,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:16:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:30,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:16:30,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:16:30,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:16:30,145 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:16:30,145 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:16:30,145 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 02:16:30,145 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 02:16:30,146 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:16:30,146 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:16:30,146 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:16:30,146 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:16:30,146 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 02:16:30,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 02:16:30,146 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:16:30,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:16:30,147 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:16:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:16:30,147 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 02:16:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 02:16:30,147 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 02:16:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 02:16:30,147 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 02:16:30,147 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 02:16:30,147 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:16:30,148 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:16:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:16:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:16:30,148 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:16:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 02:16:30,148 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 02:16:30,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:16:30,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:16:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:16:30,149 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:16:30,149 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-03 02:16:30,149 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-03 02:16:30,278 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:16:30,280 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:16:31,337 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:16:31,774 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:16:31,775 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-03 02:16:31,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:16:31 BoogieIcfgContainer [2022-11-03 02:16:31,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:16:31,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:16:31,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:16:31,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:16:31,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:16:29" (1/3) ... [2022-11-03 02:16:31,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5487b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:16:31, skipping insertion in model container [2022-11-03 02:16:31,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:16:29" (2/3) ... [2022-11-03 02:16:31,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5487b45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:16:31, skipping insertion in model container [2022-11-03 02:16:31,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:16:31" (3/3) ... [2022-11-03 02:16:31,791 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-11-03 02:16:31,810 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:16:31,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:16:31,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:16:31,906 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;@2dff2ccc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:16:31,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:16:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-03 02:16:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:16:31,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:31,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:31,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:31,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:31,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1717664810, now seen corresponding path program 1 times [2022-11-03 02:16:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114424311] [2022-11-03 02:16:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:32,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114424311] [2022-11-03 02:16:32,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114424311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:32,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:32,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:16:32,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508408440] [2022-11-03 02:16:32,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:32,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:16:32,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:16:32,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:16:32,367 INFO L87 Difference]: Start difference. First operand has 222 states, 166 states have (on average 1.536144578313253) internal successors, (255), 174 states have internal predecessors, (255), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:32,874 INFO L93 Difference]: Finished difference Result 494 states and 733 transitions. [2022-11-03 02:16:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:16:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:16:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:32,887 INFO L225 Difference]: With dead ends: 494 [2022-11-03 02:16:32,887 INFO L226 Difference]: Without dead ends: 276 [2022-11-03 02:16:32,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:16:32,904 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 377 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:32,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 548 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:16:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-03 02:16:32,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 269. [2022-11-03 02:16:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 201 states have (on average 1.4328358208955223) internal successors, (288), 206 states have internal predecessors, (288), 46 states have call successors, (46), 22 states have call predecessors, (46), 20 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-03 02:16:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 376 transitions. [2022-11-03 02:16:32,981 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 376 transitions. Word has length 45 [2022-11-03 02:16:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:32,981 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 376 transitions. [2022-11-03 02:16:32,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 376 transitions. [2022-11-03 02:16:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:16:32,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:32,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:32,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:16:32,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1658327863, now seen corresponding path program 1 times [2022-11-03 02:16:32,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119510157] [2022-11-03 02:16:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:33,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119510157] [2022-11-03 02:16:33,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119510157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:33,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:33,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:16:33,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118613395] [2022-11-03 02:16:33,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:33,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:16:33,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:16:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:16:33,146 INFO L87 Difference]: Start difference. First operand 269 states and 376 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:34,005 INFO L93 Difference]: Finished difference Result 671 states and 879 transitions. [2022-11-03 02:16:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:16:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-03 02:16:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:34,011 INFO L225 Difference]: With dead ends: 671 [2022-11-03 02:16:34,011 INFO L226 Difference]: Without dead ends: 539 [2022-11-03 02:16:34,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:16:34,013 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 792 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:34,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1001 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:16:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-03 02:16:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 455. [2022-11-03 02:16:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 333 states have (on average 1.3453453453453454) internal successors, (448), 339 states have internal predecessors, (448), 73 states have call successors, (73), 45 states have call predecessors, (73), 47 states have return successors, (73), 72 states have call predecessors, (73), 69 states have call successors, (73) [2022-11-03 02:16:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 594 transitions. [2022-11-03 02:16:34,071 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 594 transitions. Word has length 45 [2022-11-03 02:16:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:34,072 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 594 transitions. [2022-11-03 02:16:34,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:16:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 594 transitions. [2022-11-03 02:16:34,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:16:34,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:34,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:34,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:16:34,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:34,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:34,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1118233714, now seen corresponding path program 1 times [2022-11-03 02:16:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:34,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868328230] [2022-11-03 02:16:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:34,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:34,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868328230] [2022-11-03 02:16:34,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868328230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:34,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:34,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:16:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807343883] [2022-11-03 02:16:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:34,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:16:34,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:34,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:16:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:16:34,381 INFO L87 Difference]: Start difference. First operand 455 states and 594 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:16:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:35,116 INFO L93 Difference]: Finished difference Result 971 states and 1210 transitions. [2022-11-03 02:16:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:16:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-03 02:16:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:35,121 INFO L225 Difference]: With dead ends: 971 [2022-11-03 02:16:35,121 INFO L226 Difference]: Without dead ends: 669 [2022-11-03 02:16:35,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:16:35,124 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 448 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:35,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 878 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:16:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-03 02:16:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 634. [2022-11-03 02:16:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 458 states have (on average 1.3100436681222707) internal successors, (600), 465 states have internal predecessors, (600), 100 states have call successors, (100), 68 states have call predecessors, (100), 74 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2022-11-03 02:16:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 804 transitions. [2022-11-03 02:16:35,225 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 804 transitions. Word has length 46 [2022-11-03 02:16:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:35,226 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 804 transitions. [2022-11-03 02:16:35,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-03 02:16:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 804 transitions. [2022-11-03 02:16:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:16:35,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:35,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:35,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:16:35,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash 377291076, now seen corresponding path program 1 times [2022-11-03 02:16:35,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:35,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802547414] [2022-11-03 02:16:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:35,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:35,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802547414] [2022-11-03 02:16:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802547414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:35,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:35,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:16:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201115431] [2022-11-03 02:16:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:35,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:35,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:35,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:16:35,291 INFO L87 Difference]: Start difference. First operand 634 states and 804 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:16:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:35,469 INFO L93 Difference]: Finished difference Result 1198 states and 1474 transitions. [2022-11-03 02:16:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:35,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-03 02:16:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:35,473 INFO L225 Difference]: With dead ends: 1198 [2022-11-03 02:16:35,474 INFO L226 Difference]: Without dead ends: 766 [2022-11-03 02:16:35,475 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 [2022-11-03 02:16:35,476 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 67 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:35,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 514 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-03 02:16:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 661. [2022-11-03 02:16:35,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 481 states have (on average 1.2993762993762994) internal successors, (625), 488 states have internal predecessors, (625), 102 states have call successors, (102), 70 states have call predecessors, (102), 76 states have return successors, (106), 104 states have call predecessors, (106), 98 states have call successors, (106) [2022-11-03 02:16:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 833 transitions. [2022-11-03 02:16:35,547 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 833 transitions. Word has length 47 [2022-11-03 02:16:35,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:35,548 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 833 transitions. [2022-11-03 02:16:35,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:16:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 833 transitions. [2022-11-03 02:16:35,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-03 02:16:35,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:35,550 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:35,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:16:35,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:35,551 INFO L85 PathProgramCache]: Analyzing trace with hash 871306284, now seen corresponding path program 1 times [2022-11-03 02:16:35,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:35,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51421954] [2022-11-03 02:16:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:35,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:16:35,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:35,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51421954] [2022-11-03 02:16:35,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51421954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:35,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:35,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:16:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753499570] [2022-11-03 02:16:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:35,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:16:35,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:16:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:16:35,631 INFO L87 Difference]: Start difference. First operand 661 states and 833 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:16:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:35,772 INFO L93 Difference]: Finished difference Result 851 states and 1054 transitions. [2022-11-03 02:16:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:16:35,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-03 02:16:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:35,776 INFO L225 Difference]: With dead ends: 851 [2022-11-03 02:16:35,776 INFO L226 Difference]: Without dead ends: 578 [2022-11-03 02:16:35,777 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 [2022-11-03 02:16:35,778 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 282 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:35,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 335 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-03 02:16:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 469. [2022-11-03 02:16:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 341 states have (on average 1.2991202346041055) internal successors, (443), 346 states have internal predecessors, (443), 78 states have call successors, (78), 50 states have call predecessors, (78), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-03 02:16:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 595 transitions. [2022-11-03 02:16:35,831 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 595 transitions. Word has length 53 [2022-11-03 02:16:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:35,832 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 595 transitions. [2022-11-03 02:16:35,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:16:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 595 transitions. [2022-11-03 02:16:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:16:35,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:35,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:35,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:16:35,835 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash -647770964, now seen corresponding path program 1 times [2022-11-03 02:16:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:35,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907382196] [2022-11-03 02:16:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:35,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907382196] [2022-11-03 02:16:35,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907382196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:35,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:16:35,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:16:35,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613043574] [2022-11-03 02:16:35,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:35,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:16:35,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:35,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:16:35,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:16:35,904 INFO L87 Difference]: Start difference. First operand 469 states and 595 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:16:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:36,219 INFO L93 Difference]: Finished difference Result 572 states and 711 transitions. [2022-11-03 02:16:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:16:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-03 02:16:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:36,223 INFO L225 Difference]: With dead ends: 572 [2022-11-03 02:16:36,223 INFO L226 Difference]: Without dead ends: 569 [2022-11-03 02:16:36,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:16:36,225 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 513 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:36,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 311 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:16:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-03 02:16:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 468. [2022-11-03 02:16:36,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 341 states have (on average 1.2903225806451613) internal successors, (440), 345 states have internal predecessors, (440), 77 states have call successors, (77), 50 states have call predecessors, (77), 48 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-03 02:16:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 591 transitions. [2022-11-03 02:16:36,286 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 591 transitions. Word has length 54 [2022-11-03 02:16:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:36,286 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 591 transitions. [2022-11-03 02:16:36,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:16:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 591 transitions. [2022-11-03 02:16:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:16:36,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:36,288 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:36,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:16:36,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:36,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:36,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1392768557, now seen corresponding path program 1 times [2022-11-03 02:16:36,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:36,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975520990] [2022-11-03 02:16:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:36,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:36,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:36,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975520990] [2022-11-03 02:16:36,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975520990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534088346] [2022-11-03 02:16:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:36,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:36,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:36,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:36,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:16:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:16:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:37,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:16:37,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534088346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:37,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238643826] [2022-11-03 02:16:37,249 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 02:16:37,249 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:16:37,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:16:37,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:16:37,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:16:44,949 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 165 for LOIs [2022-11-03 02:16:44,981 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 133 for LOIs [2022-11-03 02:16:44,996 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 161 for LOIs [2022-11-03 02:16:45,024 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 169 for LOIs [2022-11-03 02:16:45,722 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2022-11-03 02:16:45,807 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 165 for LOIs [2022-11-03 02:16:45,888 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 165 for LOIs [2022-11-03 02:16:45,920 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 172 for LOIs [2022-11-03 02:16:45,955 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:17:15,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11880#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~p_dw_pc~0 1) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= 2 ~p_dw_st~0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:17:15,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:17:15,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:17:15,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 02:17:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878380169] [2022-11-03 02:17:15,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:17:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:17:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:17:15,924 INFO L87 Difference]: Start difference. First operand 468 states and 591 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:17:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:16,605 INFO L93 Difference]: Finished difference Result 1041 states and 1246 transitions. [2022-11-03 02:17:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:17:16,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 55 [2022-11-03 02:17:16,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:16,611 INFO L225 Difference]: With dead ends: 1041 [2022-11-03 02:17:16,611 INFO L226 Difference]: Without dead ends: 1038 [2022-11-03 02:17:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:17:16,613 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 497 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:16,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 1232 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:17:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-11-03 02:17:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 763. [2022-11-03 02:17:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 546 states have (on average 1.250915750915751) internal successors, (683), 550 states have internal predecessors, (683), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-03 02:17:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 930 transitions. [2022-11-03 02:17:16,702 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 930 transitions. Word has length 55 [2022-11-03 02:17:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:16,702 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 930 transitions. [2022-11-03 02:17:16,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 4 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:17:16,703 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 930 transitions. [2022-11-03 02:17:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-03 02:17:16,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:16,704 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:16,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:16,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:17:16,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:16,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:16,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1225842540, now seen corresponding path program 2 times [2022-11-03 02:17:16,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:16,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522863536] [2022-11-03 02:17:16,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:16,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:16,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522863536] [2022-11-03 02:17:16,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522863536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:16,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:16,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:17:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032811201] [2022-11-03 02:17:16,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:16,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:17:16,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:17:16,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:17:16,961 INFO L87 Difference]: Start difference. First operand 763 states and 930 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:17:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:17,143 INFO L93 Difference]: Finished difference Result 1176 states and 1403 transitions. [2022-11-03 02:17:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:17:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 58 [2022-11-03 02:17:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:17,147 INFO L225 Difference]: With dead ends: 1176 [2022-11-03 02:17:17,147 INFO L226 Difference]: Without dead ends: 765 [2022-11-03 02:17:17,149 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 [2022-11-03 02:17:17,150 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 285 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:17,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 368 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-03 02:17:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 759. [2022-11-03 02:17:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 542 states have (on average 1.2380073800738007) internal successors, (671), 546 states have internal predecessors, (671), 125 states have call successors, (125), 92 states have call predecessors, (125), 90 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2022-11-03 02:17:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 918 transitions. [2022-11-03 02:17:17,233 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 918 transitions. Word has length 58 [2022-11-03 02:17:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:17,233 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 918 transitions. [2022-11-03 02:17:17,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:17:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 918 transitions. [2022-11-03 02:17:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-03 02:17:17,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:17,235 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] [2022-11-03 02:17:17,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:17:17,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1811806047, now seen corresponding path program 1 times [2022-11-03 02:17:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:17,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895596658] [2022-11-03 02:17:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:17,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:17,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:17,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895596658] [2022-11-03 02:17:17,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895596658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:17,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:17,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:17:17,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495013369] [2022-11-03 02:17:17,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:17,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:17:17,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:17:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:17:17,337 INFO L87 Difference]: Start difference. First operand 759 states and 918 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:17:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:18,260 INFO L93 Difference]: Finished difference Result 1427 states and 2005 transitions. [2022-11-03 02:17:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:17:18,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2022-11-03 02:17:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:18,274 INFO L225 Difference]: With dead ends: 1427 [2022-11-03 02:17:18,274 INFO L226 Difference]: Without dead ends: 1285 [2022-11-03 02:17:18,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:17:18,276 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 1083 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:18,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 1127 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:17:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-11-03 02:17:18,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1272. [2022-11-03 02:17:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 962 states have (on average 1.3544698544698546) internal successors, (1303), 969 states have internal predecessors, (1303), 194 states have call successors, (194), 116 states have call predecessors, (194), 114 states have return successors, (237), 188 states have call predecessors, (237), 191 states have call successors, (237) [2022-11-03 02:17:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1734 transitions. [2022-11-03 02:17:18,425 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1734 transitions. Word has length 56 [2022-11-03 02:17:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:18,425 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1734 transitions. [2022-11-03 02:17:18,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:17:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1734 transitions. [2022-11-03 02:17:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:17:18,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:18,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:18,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:17:18,427 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1279350032, now seen corresponding path program 1 times [2022-11-03 02:17:18,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:18,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036200575] [2022-11-03 02:17:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:18,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:17:18,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:18,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036200575] [2022-11-03 02:17:18,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036200575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:18,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:18,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:17:18,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980369775] [2022-11-03 02:17:18,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:18,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:17:18,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:17:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:17:18,478 INFO L87 Difference]: Start difference. First operand 1272 states and 1734 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:17:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:18,731 INFO L93 Difference]: Finished difference Result 1891 states and 2444 transitions. [2022-11-03 02:17:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:17:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-03 02:17:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:18,740 INFO L225 Difference]: With dead ends: 1891 [2022-11-03 02:17:18,740 INFO L226 Difference]: Without dead ends: 1528 [2022-11-03 02:17:18,742 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 [2022-11-03 02:17:18,743 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 42 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:18,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 550 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-11-03 02:17:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1347. [2022-11-03 02:17:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1023 states have (on average 1.3470185728250244) internal successors, (1378), 1030 states have internal predecessors, (1378), 201 states have call successors, (201), 123 states have call predecessors, (201), 121 states have return successors, (244), 195 states have call predecessors, (244), 198 states have call successors, (244) [2022-11-03 02:17:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1823 transitions. [2022-11-03 02:17:18,924 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1823 transitions. Word has length 61 [2022-11-03 02:17:18,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:18,926 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 1823 transitions. [2022-11-03 02:17:18,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:17:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1823 transitions. [2022-11-03 02:17:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:17:18,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:18,928 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:18,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:17:18,929 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:18,929 INFO L85 PathProgramCache]: Analyzing trace with hash -983373549, now seen corresponding path program 1 times [2022-11-03 02:17:18,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:18,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908288720] [2022-11-03 02:17:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:18,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:17:19,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:19,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908288720] [2022-11-03 02:17:19,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908288720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:19,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:19,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:17:19,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382429385] [2022-11-03 02:17:19,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:19,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:17:19,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:19,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:17:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:17:19,110 INFO L87 Difference]: Start difference. First operand 1347 states and 1823 transitions. Second operand has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:17:20,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:20,006 INFO L93 Difference]: Finished difference Result 2396 states and 3006 transitions. [2022-11-03 02:17:20,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:17:20,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 70 [2022-11-03 02:17:20,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:20,015 INFO L225 Difference]: With dead ends: 2396 [2022-11-03 02:17:20,016 INFO L226 Difference]: Without dead ends: 1715 [2022-11-03 02:17:20,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:17:20,019 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 430 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:20,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 984 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:17:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-11-03 02:17:20,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1666. [2022-11-03 02:17:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1237 states have (on average 1.3047696038803558) internal successors, (1614), 1244 states have internal predecessors, (1614), 257 states have call successors, (257), 172 states have call predecessors, (257), 170 states have return successors, (300), 251 states have call predecessors, (300), 254 states have call successors, (300) [2022-11-03 02:17:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2171 transitions. [2022-11-03 02:17:20,256 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2171 transitions. Word has length 70 [2022-11-03 02:17:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:20,256 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2171 transitions. [2022-11-03 02:17:20,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:17:20,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2171 transitions. [2022-11-03 02:17:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:17:20,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:20,259 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:17:20,259 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash -462296564, now seen corresponding path program 1 times [2022-11-03 02:17:20,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:20,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596275335] [2022-11-03 02:17:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:20,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:17:20,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:20,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596275335] [2022-11-03 02:17:20,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596275335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:20,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:17:20,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:17:20,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652004021] [2022-11-03 02:17:20,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:20,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:17:20,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:17:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:17:20,313 INFO L87 Difference]: Start difference. First operand 1666 states and 2171 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:17:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:20,653 INFO L93 Difference]: Finished difference Result 2632 states and 3265 transitions. [2022-11-03 02:17:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:17:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-03 02:17:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:20,663 INFO L225 Difference]: With dead ends: 2632 [2022-11-03 02:17:20,663 INFO L226 Difference]: Without dead ends: 1842 [2022-11-03 02:17:20,665 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 [2022-11-03 02:17:20,666 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 37 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:20,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 544 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:20,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-11-03 02:17:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1713. [2022-11-03 02:17:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1276 states have (on average 1.3009404388714734) internal successors, (1660), 1283 states have internal predecessors, (1660), 261 states have call successors, (261), 176 states have call predecessors, (261), 174 states have return successors, (304), 255 states have call predecessors, (304), 258 states have call successors, (304) [2022-11-03 02:17:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2225 transitions. [2022-11-03 02:17:20,895 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2225 transitions. Word has length 71 [2022-11-03 02:17:20,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:20,896 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2225 transitions. [2022-11-03 02:17:20,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:17:20,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2225 transitions. [2022-11-03 02:17:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:17:20,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:20,899 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:20,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:17:20,900 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1326549782, now seen corresponding path program 1 times [2022-11-03 02:17:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:20,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998196191] [2022-11-03 02:17:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:17:21,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:21,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998196191] [2022-11-03 02:17:21,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998196191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:21,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138546936] [2022-11-03 02:17:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:21,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:21,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:21,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:21,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:17:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:21,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:17:21,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:17:21,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:21,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138546936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:21,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:17:21,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 02:17:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371958575] [2022-11-03 02:17:21,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:21,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:17:21,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:17:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:17:21,519 INFO L87 Difference]: Start difference. First operand 1713 states and 2225 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:17:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:21,964 INFO L93 Difference]: Finished difference Result 2577 states and 3230 transitions. [2022-11-03 02:17:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:17:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-03 02:17:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:21,972 INFO L225 Difference]: With dead ends: 2577 [2022-11-03 02:17:21,972 INFO L226 Difference]: Without dead ends: 1530 [2022-11-03 02:17:21,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:17:21,976 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 279 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:21,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 1139 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:17:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-11-03 02:17:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1345. [2022-11-03 02:17:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1039 states have (on average 1.3378248315688162) internal successors, (1390), 1046 states have internal predecessors, (1390), 190 states have call successors, (190), 116 states have call predecessors, (190), 114 states have return successors, (233), 184 states have call predecessors, (233), 187 states have call successors, (233) [2022-11-03 02:17:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1813 transitions. [2022-11-03 02:17:22,165 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1813 transitions. Word has length 102 [2022-11-03 02:17:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:22,165 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 1813 transitions. [2022-11-03 02:17:22,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:17:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1813 transitions. [2022-11-03 02:17:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:17:22,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:22,169 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:22,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:17:22,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:17:22,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1978668510, now seen corresponding path program 1 times [2022-11-03 02:17:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:22,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107906393] [2022-11-03 02:17:22,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:22,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:17:22,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:22,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107906393] [2022-11-03 02:17:22,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107906393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:22,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479909852] [2022-11-03 02:17:22,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:22,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:22,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:22,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:22,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:17:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:22,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:17:22,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:17:22,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:22,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479909852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:22,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:17:22,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:17:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63759281] [2022-11-03 02:17:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:22,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:17:22,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:22,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:17:22,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:17:22,873 INFO L87 Difference]: Start difference. First operand 1345 states and 1813 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:17:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:23,322 INFO L93 Difference]: Finished difference Result 1894 states and 2438 transitions. [2022-11-03 02:17:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:17:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-03 02:17:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:23,329 INFO L225 Difference]: With dead ends: 1894 [2022-11-03 02:17:23,330 INFO L226 Difference]: Without dead ends: 1301 [2022-11-03 02:17:23,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:17:23,332 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 69 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:23,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1451 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:17:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-11-03 02:17:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1209. [2022-11-03 02:17:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 939 states have (on average 1.3556975505857296) internal successors, (1273), 946 states have internal predecessors, (1273), 171 states have call successors, (171), 99 states have call predecessors, (171), 97 states have return successors, (214), 165 states have call predecessors, (214), 168 states have call successors, (214) [2022-11-03 02:17:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1658 transitions. [2022-11-03 02:17:23,549 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1658 transitions. Word has length 112 [2022-11-03 02:17:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:23,550 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1658 transitions. [2022-11-03 02:17:23,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:17:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1658 transitions. [2022-11-03 02:17:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 02:17:23,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:23,558 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:23,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:23,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:17:23,779 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:23,780 INFO L85 PathProgramCache]: Analyzing trace with hash -35244330, now seen corresponding path program 1 times [2022-11-03 02:17:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:23,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161220251] [2022-11-03 02:17:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:17:23,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161220251] [2022-11-03 02:17:23,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161220251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014837746] [2022-11-03 02:17:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:23,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:23,995 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:24,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:17:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:17:24,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:17:24,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:24,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014837746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:24,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:17:24,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 02:17:24,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233251853] [2022-11-03 02:17:24,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:24,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:17:24,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:17:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:17:24,223 INFO L87 Difference]: Start difference. First operand 1209 states and 1658 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:17:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:24,614 INFO L93 Difference]: Finished difference Result 1958 states and 2503 transitions. [2022-11-03 02:17:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:17:24,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-03 02:17:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:24,622 INFO L225 Difference]: With dead ends: 1958 [2022-11-03 02:17:24,622 INFO L226 Difference]: Without dead ends: 1501 [2022-11-03 02:17:24,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:17:24,627 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 265 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:24,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1222 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:17:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-03 02:17:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1467. [2022-11-03 02:17:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1101 states have (on average 1.3197093551316985) internal successors, (1453), 1114 states have internal predecessors, (1453), 219 states have call successors, (219), 141 states have call predecessors, (219), 145 states have return successors, (274), 213 states have call predecessors, (274), 216 states have call successors, (274) [2022-11-03 02:17:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1946 transitions. [2022-11-03 02:17:24,850 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1946 transitions. Word has length 113 [2022-11-03 02:17:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:24,850 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 1946 transitions. [2022-11-03 02:17:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:17:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1946 transitions. [2022-11-03 02:17:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:17:24,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:24,854 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:24,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:25,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:17:25,078 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:25,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1194020130, now seen corresponding path program 1 times [2022-11-03 02:17:25,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:25,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019832150] [2022-11-03 02:17:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:17:26,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019832150] [2022-11-03 02:17:26,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019832150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:26,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140184247] [2022-11-03 02:17:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:26,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:26,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:26,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:17:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:26,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:17:26,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:17:27,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:17:29,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140184247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656125427] [2022-11-03 02:17:29,039 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:17:29,040 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:17:29,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:17:29,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:17:29,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:18:14,271 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 304 for LOIs [2022-11-03 02:18:15,114 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 256 for LOIs [2022-11-03 02:18:15,192 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 249 for LOIs [2022-11-03 02:18:15,274 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 316 for LOIs [2022-11-03 02:18:17,736 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 184 for LOIs [2022-11-03 02:18:18,057 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 133 for LOIs [2022-11-03 02:18:18,405 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 308 for LOIs [2022-11-03 02:18:18,962 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 331 for LOIs [2022-11-03 02:18:19,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:42,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55049#(and (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (= 0 ~t4_st~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (= ~T5_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= 1 ~q_req_up~0) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= ~local~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~q_req_up~0 1) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~t3_i~0 0) (<= 0 ~t6_pc~0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= ~p_last_write~0 2147483647) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (<= ~E_8~0 2) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:42,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:42,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:42,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-03 02:19:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459646314] [2022-11-03 02:19:42,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:42,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:19:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:19:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=771, Invalid=10149, Unknown=0, NotChecked=0, Total=10920 [2022-11-03 02:19:42,232 INFO L87 Difference]: Start difference. First operand 1467 states and 1946 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 02:20:04,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:04,117 INFO L93 Difference]: Finished difference Result 3757 states and 4600 transitions. [2022-11-03 02:20:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-03 02:20:04,118 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-03 02:20:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:04,131 INFO L225 Difference]: With dead ends: 3757 [2022-11-03 02:20:04,131 INFO L226 Difference]: Without dead ends: 3042 [2022-11-03 02:20:04,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 288 SyntacticMatches, 6 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40846 ImplicationChecksByTransitivity, 99.2s TimeCoverageRelationStatistics Valid=9166, Invalid=89744, Unknown=0, NotChecked=0, Total=98910 [2022-11-03 02:20:04,150 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 4117 mSDsluCounter, 4039 mSDsCounter, 0 mSdLazyCounter, 8193 mSolverCounterSat, 2134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 3747 SdHoareTripleChecker+Invalid, 10327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2134 IncrementalHoareTripleChecker+Valid, 8193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:04,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4119 Valid, 3747 Invalid, 10327 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2134 Valid, 8193 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 02:20:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2022-11-03 02:20:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1743. [2022-11-03 02:20:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1285 states have (on average 1.2949416342412452) internal successors, (1664), 1300 states have internal predecessors, (1664), 264 states have call successors, (264), 178 states have call predecessors, (264), 192 states have return successors, (331), 266 states have call predecessors, (331), 261 states have call successors, (331) [2022-11-03 02:20:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2259 transitions. [2022-11-03 02:20:04,472 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2259 transitions. Word has length 114 [2022-11-03 02:20:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:04,473 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 2259 transitions. [2022-11-03 02:20:04,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-03 02:20:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2259 transitions. [2022-11-03 02:20:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 02:20:04,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:04,477 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:04,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 02:20:04,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:20:04,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1348825369, now seen corresponding path program 1 times [2022-11-03 02:20:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:04,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846619495] [2022-11-03 02:20:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:20:05,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846619495] [2022-11-03 02:20:05,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846619495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479480706] [2022-11-03 02:20:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:05,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:05,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:05,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:20:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:20:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:20:05,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:20:05,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479480706] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:05,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:20:05,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 02:20:05,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597707870] [2022-11-03 02:20:05,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:20:05,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:20:05,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:20:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:20:05,568 INFO L87 Difference]: Start difference. First operand 1743 states and 2259 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:20:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:06,516 INFO L93 Difference]: Finished difference Result 3067 states and 3807 transitions. [2022-11-03 02:20:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:20:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-03 02:20:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:06,527 INFO L225 Difference]: With dead ends: 3067 [2022-11-03 02:20:06,528 INFO L226 Difference]: Without dead ends: 2076 [2022-11-03 02:20:06,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:20:06,531 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 443 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:06,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 587 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:20:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-11-03 02:20:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1823. [2022-11-03 02:20:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1823 states, 1330 states have (on average 1.2894736842105263) internal successors, (1715), 1348 states have internal predecessors, (1715), 283 states have call successors, (283), 187 states have call predecessors, (283), 208 states have return successors, (371), 289 states have call predecessors, (371), 280 states have call successors, (371) [2022-11-03 02:20:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1823 states to 1823 states and 2369 transitions. [2022-11-03 02:20:06,859 INFO L78 Accepts]: Start accepts. Automaton has 1823 states and 2369 transitions. Word has length 115 [2022-11-03 02:20:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:06,860 INFO L495 AbstractCegarLoop]: Abstraction has 1823 states and 2369 transitions. [2022-11-03 02:20:06,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:20:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1823 states and 2369 transitions. [2022-11-03 02:20:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:20:06,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:06,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:06,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:20:07,079 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1267765248, now seen corresponding path program 1 times [2022-11-03 02:20:07,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:07,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320000397] [2022-11-03 02:20:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:20:07,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320000397] [2022-11-03 02:20:07,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320000397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:07,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922284650] [2022-11-03 02:20:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:07,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:07,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:07,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:07,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:20:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:20:07,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:20:07,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:20:07,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922284650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:20:07,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:20:07,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:20:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252947] [2022-11-03 02:20:07,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:20:07,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:20:07,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:20:07,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:07,482 INFO L87 Difference]: Start difference. First operand 1823 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:07,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:07,927 INFO L93 Difference]: Finished difference Result 3117 states and 4493 transitions. [2022-11-03 02:20:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:20:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-03 02:20:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:07,941 INFO L225 Difference]: With dead ends: 3117 [2022-11-03 02:20:07,941 INFO L226 Difference]: Without dead ends: 2462 [2022-11-03 02:20:07,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:07,946 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 281 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:07,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-11-03 02:20:08,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2453. [2022-11-03 02:20:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1848 states have (on average 1.3474025974025974) internal successors, (2490), 1869 states have internal predecessors, (2490), 365 states have call successors, (365), 217 states have call predecessors, (365), 238 states have return successors, (495), 368 states have call predecessors, (495), 362 states have call successors, (495) [2022-11-03 02:20:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3350 transitions. [2022-11-03 02:20:08,487 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3350 transitions. Word has length 109 [2022-11-03 02:20:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:08,488 INFO L495 AbstractCegarLoop]: Abstraction has 2453 states and 3350 transitions. [2022-11-03 02:20:08,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3350 transitions. [2022-11-03 02:20:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:20:08,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:08,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:08,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:08,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:20:08,715 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash 365418080, now seen corresponding path program 1 times [2022-11-03 02:20:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894432283] [2022-11-03 02:20:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:20:08,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:08,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894432283] [2022-11-03 02:20:08,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894432283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:08,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636128707] [2022-11-03 02:20:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:08,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:08,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:08,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:08,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:20:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:20:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:20:09,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:20:09,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636128707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:20:09,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:20:09,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:20:09,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048984286] [2022-11-03 02:20:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:20:09,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:20:09,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:20:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:09,062 INFO L87 Difference]: Start difference. First operand 2453 states and 3350 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:09,707 INFO L93 Difference]: Finished difference Result 4992 states and 7492 transitions. [2022-11-03 02:20:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:20:09,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-03 02:20:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:09,725 INFO L225 Difference]: With dead ends: 4992 [2022-11-03 02:20:09,726 INFO L226 Difference]: Without dead ends: 3707 [2022-11-03 02:20:09,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:09,733 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 278 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:09,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-11-03 02:20:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3693. [2022-11-03 02:20:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 2869 states have (on average 1.397699546880446) internal successors, (4010), 2896 states have internal predecessors, (4010), 524 states have call successors, (524), 277 states have call predecessors, (524), 298 states have return successors, (734), 521 states have call predecessors, (734), 521 states have call successors, (734) [2022-11-03 02:20:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 5268 transitions. [2022-11-03 02:20:10,225 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 5268 transitions. Word has length 109 [2022-11-03 02:20:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:10,225 INFO L495 AbstractCegarLoop]: Abstraction has 3693 states and 5268 transitions. [2022-11-03 02:20:10,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 5268 transitions. [2022-11-03 02:20:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:20:10,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:10,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:10,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:10,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:10,459 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash 802163712, now seen corresponding path program 1 times [2022-11-03 02:20:10,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:10,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299986677] [2022-11-03 02:20:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:10,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:20:10,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299986677] [2022-11-03 02:20:10,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299986677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885221699] [2022-11-03 02:20:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:10,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:10,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:10,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:10,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:20:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:10,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:20:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:20:10,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:20:10,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885221699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:20:10,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:20:10,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:20:10,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986476330] [2022-11-03 02:20:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:20:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:20:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:20:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:10,848 INFO L87 Difference]: Start difference. First operand 3693 states and 5268 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:11,895 INFO L93 Difference]: Finished difference Result 8682 states and 13349 transitions. [2022-11-03 02:20:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:20:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-03 02:20:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:11,924 INFO L225 Difference]: With dead ends: 8682 [2022-11-03 02:20:11,924 INFO L226 Difference]: Without dead ends: 6157 [2022-11-03 02:20:11,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:11,934 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 266 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:11,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6157 states. [2022-11-03 02:20:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6157 to 6133. [2022-11-03 02:20:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6133 states, 4881 states have (on average 1.4320835894283959) internal successors, (6990), 4920 states have internal predecessors, (6990), 832 states have call successors, (832), 397 states have call predecessors, (832), 418 states have return successors, (1194), 817 states have call predecessors, (1194), 829 states have call successors, (1194) [2022-11-03 02:20:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6133 states to 6133 states and 9016 transitions. [2022-11-03 02:20:12,985 INFO L78 Accepts]: Start accepts. Automaton has 6133 states and 9016 transitions. Word has length 109 [2022-11-03 02:20:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:12,986 INFO L495 AbstractCegarLoop]: Abstraction has 6133 states and 9016 transitions. [2022-11-03 02:20:12,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6133 states and 9016 transitions. [2022-11-03 02:20:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:20:12,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:12,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:13,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:13,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:13,211 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1497608608, now seen corresponding path program 1 times [2022-11-03 02:20:13,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:13,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290014094] [2022-11-03 02:20:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:13,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:20:13,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290014094] [2022-11-03 02:20:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290014094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154501739] [2022-11-03 02:20:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:13,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:13,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:13,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:20:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:13,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:20:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:20:13,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:20:13,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154501739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:20:13,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:20:13,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:20:13,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121029595] [2022-11-03 02:20:13,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:20:13,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:20:13,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:13,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:20:13,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:13,585 INFO L87 Difference]: Start difference. First operand 6133 states and 9016 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:15,001 INFO L93 Difference]: Finished difference Result 15942 states and 24781 transitions. [2022-11-03 02:20:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:20:15,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2022-11-03 02:20:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:15,043 INFO L225 Difference]: With dead ends: 15942 [2022-11-03 02:20:15,043 INFO L226 Difference]: Without dead ends: 10977 [2022-11-03 02:20:15,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:20:15,064 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 272 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:15,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 445 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:15,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10977 states. [2022-11-03 02:20:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10977 to 10933. [2022-11-03 02:20:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10933 states, 8845 states have (on average 1.4505370265686828) internal successors, (12830), 8908 states have internal predecessors, (12830), 1428 states have call successors, (1428), 637 states have call predecessors, (1428), 658 states have return successors, (2078), 1389 states have call predecessors, (2078), 1425 states have call successors, (2078) [2022-11-03 02:20:16,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10933 states to 10933 states and 16336 transitions. [2022-11-03 02:20:16,284 INFO L78 Accepts]: Start accepts. Automaton has 10933 states and 16336 transitions. Word has length 109 [2022-11-03 02:20:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:16,284 INFO L495 AbstractCegarLoop]: Abstraction has 10933 states and 16336 transitions. [2022-11-03 02:20:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 02:20:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 10933 states and 16336 transitions. [2022-11-03 02:20:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 02:20:16,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:16,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:16,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:16,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 02:20:16,515 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:16,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -728981696, now seen corresponding path program 1 times [2022-11-03 02:20:16,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:16,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587408557] [2022-11-03 02:20:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:16,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:20:16,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:16,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587408557] [2022-11-03 02:20:16,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587408557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:20:16,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:20:16,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:20:16,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255180075] [2022-11-03 02:20:16,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:20:16,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:20:16,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:20:16,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:20:16,599 INFO L87 Difference]: Start difference. First operand 10933 states and 16336 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:20:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:18,744 INFO L93 Difference]: Finished difference Result 20985 states and 32499 transitions. [2022-11-03 02:20:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:20:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2022-11-03 02:20:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:18,803 INFO L225 Difference]: With dead ends: 20985 [2022-11-03 02:20:18,803 INFO L226 Difference]: Without dead ends: 13141 [2022-11-03 02:20:18,829 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 [2022-11-03 02:20:18,829 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 92 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:18,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 615 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13141 states. [2022-11-03 02:20:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13141 to 12357. [2022-11-03 02:20:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12357 states, 10205 states have (on average 1.487702106810387) internal successors, (15182), 10268 states have internal predecessors, (15182), 1460 states have call successors, (1460), 669 states have call predecessors, (1460), 690 states have return successors, (2110), 1421 states have call predecessors, (2110), 1457 states have call successors, (2110) [2022-11-03 02:20:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12357 states to 12357 states and 18752 transitions. [2022-11-03 02:20:20,164 INFO L78 Accepts]: Start accepts. Automaton has 12357 states and 18752 transitions. Word has length 109 [2022-11-03 02:20:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:20,165 INFO L495 AbstractCegarLoop]: Abstraction has 12357 states and 18752 transitions. [2022-11-03 02:20:20,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:20:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 12357 states and 18752 transitions. [2022-11-03 02:20:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:20:20,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:20,181 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:20,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 02:20:20,182 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:20,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1755810669, now seen corresponding path program 1 times [2022-11-03 02:20:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:20,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959665056] [2022-11-03 02:20:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:20,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:20:20,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959665056] [2022-11-03 02:20:20,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959665056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:20,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515737717] [2022-11-03 02:20:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:20,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:20,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:20,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:20:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:21,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:20:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:20:22,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:20:23,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515737717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:23,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908804257] [2022-11-03 02:20:23,934 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 02:20:23,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:20:23,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:20:23,935 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:20:23,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:48,212 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 239 for LOIs [2022-11-03 02:20:48,304 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 240 for LOIs [2022-11-03 02:20:48,372 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 239 for LOIs [2022-11-03 02:20:48,448 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 239 for LOIs [2022-11-03 02:20:49,288 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 239 for LOIs [2022-11-03 02:20:49,723 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 120 for LOIs [2022-11-03 02:20:49,986 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 243 for LOIs [2022-11-03 02:20:50,061 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-03 02:20:50,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:00,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '200600#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 2 ~E_5~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:00,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:00,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:00,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-03 02:22:00,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764024341] [2022-11-03 02:22:00,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:00,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 02:22:00,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:00,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 02:22:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=9127, Unknown=0, NotChecked=0, Total=9900 [2022-11-03 02:22:00,619 INFO L87 Difference]: Start difference. First operand 12357 states and 18752 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:22:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:10,225 INFO L93 Difference]: Finished difference Result 15206 states and 22094 transitions. [2022-11-03 02:22:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-03 02:22:10,226 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-03 02:22:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:10,276 INFO L225 Difference]: With dead ends: 15206 [2022-11-03 02:22:10,276 INFO L226 Difference]: Without dead ends: 14135 [2022-11-03 02:22:10,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 315 SyntacticMatches, 7 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14312 ImplicationChecksByTransitivity, 75.4s TimeCoverageRelationStatistics Valid=3540, Invalid=29766, Unknown=0, NotChecked=0, Total=33306 [2022-11-03 02:22:10,289 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 4531 mSDsluCounter, 2426 mSDsCounter, 0 mSdLazyCounter, 4635 mSolverCounterSat, 2611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4532 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 7246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2611 IncrementalHoareTripleChecker+Valid, 4635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:10,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4532 Valid, 2308 Invalid, 7246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2611 Valid, 4635 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-03 02:22:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14135 states. [2022-11-03 02:22:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14135 to 12894. [2022-11-03 02:22:11,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12894 states, 10591 states have (on average 1.4758757435558494) internal successors, (15631), 10654 states have internal predecessors, (15631), 1534 states have call successors, (1534), 728 states have call predecessors, (1534), 767 states have return successors, (2202), 1513 states have call predecessors, (2202), 1531 states have call successors, (2202) [2022-11-03 02:22:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12894 states to 12894 states and 19367 transitions. [2022-11-03 02:22:11,868 INFO L78 Accepts]: Start accepts. Automaton has 12894 states and 19367 transitions. Word has length 124 [2022-11-03 02:22:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:11,868 INFO L495 AbstractCegarLoop]: Abstraction has 12894 states and 19367 transitions. [2022-11-03 02:22:11,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-03 02:22:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 12894 states and 19367 transitions. [2022-11-03 02:22:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:22:11,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:11,885 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:11,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:12,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 02:22:12,111 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1032292256, now seen corresponding path program 1 times [2022-11-03 02:22:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:12,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393194829] [2022-11-03 02:22:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:22:12,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:12,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393194829] [2022-11-03 02:22:12,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393194829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:12,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422272204] [2022-11-03 02:22:12,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:12,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:12,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:12,317 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:12,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:22:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:12,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:22:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:22:12,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:22:12,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422272204] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:12,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:22:12,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 02:22:12,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414912898] [2022-11-03 02:22:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:12,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:22:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:22:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:22:12,824 INFO L87 Difference]: Start difference. First operand 12894 states and 19367 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:22:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:15,001 INFO L93 Difference]: Finished difference Result 13853 states and 20458 transitions. [2022-11-03 02:22:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:22:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-03 02:22:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:15,045 INFO L225 Difference]: With dead ends: 13853 [2022-11-03 02:22:15,046 INFO L226 Difference]: Without dead ends: 12245 [2022-11-03 02:22:15,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:22:15,056 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 664 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:15,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 565 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:22:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12245 states. [2022-11-03 02:22:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12245 to 11904. [2022-11-03 02:22:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 9894 states have (on average 1.4967657165959167) internal successors, (14809), 9956 states have internal predecessors, (14809), 1384 states have call successors, (1384), 607 states have call predecessors, (1384), 624 states have return successors, (2019), 1342 states have call predecessors, (2019), 1381 states have call successors, (2019) [2022-11-03 02:22:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 18212 transitions. [2022-11-03 02:22:16,647 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 18212 transitions. Word has length 125 [2022-11-03 02:22:16,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:16,647 INFO L495 AbstractCegarLoop]: Abstraction has 11904 states and 18212 transitions. [2022-11-03 02:22:16,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:22:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 18212 transitions. [2022-11-03 02:22:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:22:16,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:16,677 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:16,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:16,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_611df1fb-204d-4c34-beaf-77b11897074c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:16,891 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2100535398, now seen corresponding path program 1 times [2022-11-03 02:22:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677222871] [2022-11-03 02:22:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:22:16,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:16,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677222871] [2022-11-03 02:22:16,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677222871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:16,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:16,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:16,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829510309] [2022-11-03 02:22:16,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:16,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:16,976 INFO L87 Difference]: Start difference. First operand 11904 states and 18212 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:22:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:20,000 INFO L93 Difference]: Finished difference Result 33929 states and 53565 transitions. [2022-11-03 02:22:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:20,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-03 02:22:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:20,084 INFO L225 Difference]: With dead ends: 33929 [2022-11-03 02:22:20,085 INFO L226 Difference]: Without dead ends: 22740 [2022-11-03 02:22:20,115 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 [2022-11-03 02:22:20,116 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 272 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:20,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 447 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:22:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22740 states. [2022-11-03 02:22:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22740 to 22624. [2022-11-03 02:22:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22624 states, 18918 states have (on average 1.4966169785389576) internal successors, (28313), 19028 states have internal predecessors, (28313), 2568 states have call successors, (2568), 1119 states have call predecessors, (2568), 1136 states have return successors, (3747), 2478 states have call predecessors, (3747), 2565 states have call successors, (3747) [2022-11-03 02:22:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22624 states to 22624 states and 34628 transitions. [2022-11-03 02:22:22,962 INFO L78 Accepts]: Start accepts. Automaton has 22624 states and 34628 transitions. Word has length 147 [2022-11-03 02:22:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:22,963 INFO L495 AbstractCegarLoop]: Abstraction has 22624 states and 34628 transitions. [2022-11-03 02:22:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:22:22,963 INFO L276 IsEmpty]: Start isEmpty. Operand 22624 states and 34628 transitions. [2022-11-03 02:22:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:22:22,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:22,996 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:22,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 02:22:22,996 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:22,997 INFO L85 PathProgramCache]: Analyzing trace with hash -558126527, now seen corresponding path program 1 times [2022-11-03 02:22:22,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:22,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16320511] [2022-11-03 02:22:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:22,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:22:23,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:23,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16320511] [2022-11-03 02:22:23,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16320511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:23,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:23,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517551523] [2022-11-03 02:22:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:23,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:23,078 INFO L87 Difference]: Start difference. First operand 22624 states and 34628 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:22:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:28,022 INFO L93 Difference]: Finished difference Result 65737 states and 103197 transitions. [2022-11-03 02:22:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:28,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-11-03 02:22:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:28,168 INFO L225 Difference]: With dead ends: 65737 [2022-11-03 02:22:28,168 INFO L226 Difference]: Without dead ends: 43828 [2022-11-03 02:22:28,232 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 [2022-11-03 02:22:28,234 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 274 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:28,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 447 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:22:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43828 states. [2022-11-03 02:22:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43828 to 43600. [2022-11-03 02:22:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43600 states, 36582 states have (on average 1.4912525285659615) internal successors, (54553), 36788 states have internal predecessors, (54553), 4856 states have call successors, (4856), 2143 states have call predecessors, (4856), 2160 states have return successors, (7059), 4670 states have call predecessors, (7059), 4853 states have call successors, (7059) [2022-11-03 02:22:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43600 states to 43600 states and 66468 transitions. [2022-11-03 02:22:34,436 INFO L78 Accepts]: Start accepts. Automaton has 43600 states and 66468 transitions. Word has length 147 [2022-11-03 02:22:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:34,437 INFO L495 AbstractCegarLoop]: Abstraction has 43600 states and 66468 transitions. [2022-11-03 02:22:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 02:22:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 43600 states and 66468 transitions. [2022-11-03 02:22:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:22:34,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:34,517 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:34,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 02:22:34,518 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1151749916, now seen corresponding path program 1 times [2022-11-03 02:22:34,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:34,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451410420] [2022-11-03 02:22:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:34,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-11-03 02:22:34,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:34,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451410420] [2022-11-03 02:22:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451410420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:34,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:34,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:22:34,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947439080] [2022-11-03 02:22:34,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:34,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:34,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:34,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:22:34,597 INFO L87 Difference]: Start difference. First operand 43600 states and 66468 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)