./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/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_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/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_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/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_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/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 19daebdfafed51668fa57cd9e9dbb1892c2070de71da48d425d8df389215d260 --- 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 02:45:30,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:45:30,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:45:30,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:45:30,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:45:30,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:45:30,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:45:30,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:45:30,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:45:30,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:45:30,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:45:30,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:45:30,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:45:30,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:45:30,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:45:30,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:45:30,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:45:30,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:45:30,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:45:30,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:45:30,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:45:30,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:45:30,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:45:30,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:45:30,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:45:30,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:45:30,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:45:30,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:45:30,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:45:30,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:45:30,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:45:30,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:45:30,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:45:30,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:45:30,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:45:30,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:45:30,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:45:30,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:45:30,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:45:30,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:45:30,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:45:30,928 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:45:30,967 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:45:30,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:45:30,969 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:45:30,969 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:45:30,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:45:30,970 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:45:30,970 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:45:30,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:45:30,971 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:45:30,971 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:45:30,972 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:45:30,973 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:45:30,973 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:45:30,973 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:45:30,973 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:45:30,974 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:45:30,974 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:45:30,974 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:45:30,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:45:30,975 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:45:30,976 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:45:30,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:45:30,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:45:30,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:45:30,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:45:30,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:45:30,977 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:45:30,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:45:30,978 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:45:30,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:45:30,978 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:45:30,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:45:30,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:30,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:45:30,980 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:45:30,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:45:30,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:45:30,981 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:45:30,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:45:30,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:45:30,981 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:45:30,982 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_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19daebdfafed51668fa57cd9e9dbb1892c2070de71da48d425d8df389215d260 [2022-11-03 02:45:31,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:45:31,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:45:31,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:45:31,340 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:45:31,341 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:45:31,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2022-11-03 02:45:31,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/data/534a1d15d/bfa8a0259e2b4d5dbc47fd4fcfd43080/FLAGb02a474cc [2022-11-03 02:45:31,927 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:45:31,927 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/sv-benchmarks/c/systemc/token_ring.08.cil-2.c [2022-11-03 02:45:31,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/data/534a1d15d/bfa8a0259e2b4d5dbc47fd4fcfd43080/FLAGb02a474cc [2022-11-03 02:45:32,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/data/534a1d15d/bfa8a0259e2b4d5dbc47fd4fcfd43080 [2022-11-03 02:45:32,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:45:32,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:45:32,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:32,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:45:32,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:45:32,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765f31f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32, skipping insertion in model container [2022-11-03 02:45:32,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:45:32,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:45:32,543 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_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/sv-benchmarks/c/systemc/token_ring.08.cil-2.c[671,684] [2022-11-03 02:45:32,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:32,727 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:45:32,738 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_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/sv-benchmarks/c/systemc/token_ring.08.cil-2.c[671,684] [2022-11-03 02:45:32,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:45:32,804 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:45:32,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32 WrapperNode [2022-11-03 02:45:32,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:45:32,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:32,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:45:32,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:45:32,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,885 INFO L138 Inliner]: procedures = 44, calls = 56, calls flagged for inlining = 27, calls inlined = 27, statements flattened = 626 [2022-11-03 02:45:32,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:45:32,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:45:32,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:45:32,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:45:32,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,954 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:45:32,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:45:32,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:45:32,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:45:32,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (1/1) ... [2022-11-03 02:45:32,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:45:33,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:33,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:45:33,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:45:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:45:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 02:45:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 02:45:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:45:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:45:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:45:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:45:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:45:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:45:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:45:33,075 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:45:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:45:33,075 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:45:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:45:33,075 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:45:33,076 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:45:33,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:45:33,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:45:33,226 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:45:33,228 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:45:33,963 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:45:34,477 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:45:34,477 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-03 02:45:34,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:34 BoogieIcfgContainer [2022-11-03 02:45:34,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:45:34,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:45:34,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:45:34,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:45:34,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:45:32" (1/3) ... [2022-11-03 02:45:34,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9caac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:34, skipping insertion in model container [2022-11-03 02:45:34,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:45:32" (2/3) ... [2022-11-03 02:45:34,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9caac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:45:34, skipping insertion in model container [2022-11-03 02:45:34,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:45:34" (3/3) ... [2022-11-03 02:45:34,498 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.08.cil-2.c [2022-11-03 02:45:34,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:45:34,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:45:34,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:45:34,623 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;@34a5b446, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:45:34,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:45:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 117 states have (on average 1.5555555555555556) internal successors, (182), 121 states have internal predecessors, (182), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-03 02:45:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:45:34,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:34,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:34,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:34,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash -473499886, now seen corresponding path program 1 times [2022-11-03 02:45:34,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:34,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905295714] [2022-11-03 02:45:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:34,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:35,137 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 02:45:35,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:35,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905295714] [2022-11-03 02:45:35,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905295714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:35,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:35,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:45:35,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233421774] [2022-11-03 02:45:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:35,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:45:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:35,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:45:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:45:35,183 INFO L87 Difference]: Start difference. First operand has 150 states, 117 states have (on average 1.5555555555555556) internal successors, (182), 121 states have internal predecessors, (182), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 02:45:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:35,735 INFO L93 Difference]: Finished difference Result 427 states and 668 transitions. [2022-11-03 02:45:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:45:35,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 55 [2022-11-03 02:45:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:35,761 INFO L225 Difference]: With dead ends: 427 [2022-11-03 02:45:35,762 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 02:45:35,771 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 02:45:35,775 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 388 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:35,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 598 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:45:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 02:45:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-11-03 02:45:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 222 states have (on average 1.5045045045045045) internal successors, (334), 225 states have internal predecessors, (334), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-03 02:45:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 416 transitions. [2022-11-03 02:45:35,856 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 416 transitions. Word has length 55 [2022-11-03 02:45:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:35,856 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 416 transitions. [2022-11-03 02:45:35,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 02:45:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 416 transitions. [2022-11-03 02:45:35,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:45:35,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:35,862 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] [2022-11-03 02:45:35,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:45:35,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash -177257012, now seen corresponding path program 1 times [2022-11-03 02:45:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:35,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739306715] [2022-11-03 02:45:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:35,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:45:36,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:36,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739306715] [2022-11-03 02:45:36,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739306715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:36,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948239438] [2022-11-03 02:45:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:36,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:36,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:36,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:36,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:45:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:36,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:36,627 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 02:45:36,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:36,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948239438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:36,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:36,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:36,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942948772] [2022-11-03 02:45:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:36,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:36,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:36,631 INFO L87 Difference]: Start difference. First operand 277 states and 416 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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 02:45:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:36,772 INFO L93 Difference]: Finished difference Result 814 states and 1243 transitions. [2022-11-03 02:45:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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 108 [2022-11-03 02:45:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:36,777 INFO L225 Difference]: With dead ends: 814 [2022-11-03 02:45:36,778 INFO L226 Difference]: Without dead ends: 542 [2022-11-03 02:45:36,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 02:45:36,780 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 195 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:36,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 407 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-11-03 02:45:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 536. [2022-11-03 02:45:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 435 states have (on average 1.5011494252873563) internal successors, (653), 439 states have internal predecessors, (653), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-03 02:45:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 803 transitions. [2022-11-03 02:45:36,830 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 803 transitions. Word has length 108 [2022-11-03 02:45:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:36,831 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 803 transitions. [2022-11-03 02:45:36,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 2 states have internal predecessors, (68), 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 02:45:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 803 transitions. [2022-11-03 02:45:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:45:36,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:36,836 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] [2022-11-03 02:45:36,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:37,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:37,062 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1455926316, now seen corresponding path program 1 times [2022-11-03 02:45:37,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:37,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931466053] [2022-11-03 02:45:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:45:37,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931466053] [2022-11-03 02:45:37,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931466053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:37,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162029517] [2022-11-03 02:45:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:37,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:37,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:37,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:45:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:37,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:37,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:45:37,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:37,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162029517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:37,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:37,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:37,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994554776] [2022-11-03 02:45:37,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:37,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:37,630 INFO L87 Difference]: Start difference. First operand 536 states and 803 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 02:45:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:37,834 INFO L93 Difference]: Finished difference Result 1585 states and 2414 transitions. [2022-11-03 02:45:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:37,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 108 [2022-11-03 02:45:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:37,842 INFO L225 Difference]: With dead ends: 1585 [2022-11-03 02:45:37,843 INFO L226 Difference]: Without dead ends: 1054 [2022-11-03 02:45:37,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 02:45:37,849 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 189 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:37,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 372 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-11-03 02:45:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1046. [2022-11-03 02:45:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 855 states have (on average 1.495906432748538) internal successors, (1279), 861 states have internal predecessors, (1279), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-11-03 02:45:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1561 transitions. [2022-11-03 02:45:37,956 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1561 transitions. Word has length 108 [2022-11-03 02:45:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:37,958 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 1561 transitions. [2022-11-03 02:45:37,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 02:45:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1561 transitions. [2022-11-03 02:45:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:45:37,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:37,966 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] [2022-11-03 02:45:38,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:38,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:38,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash 579099276, now seen corresponding path program 1 times [2022-11-03 02:45:38,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:38,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781475808] [2022-11-03 02:45:38,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:45:38,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:38,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781475808] [2022-11-03 02:45:38,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781475808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:38,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928895212] [2022-11-03 02:45:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:38,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:38,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:38,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:38,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:45:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:38,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:45:38,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:38,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928895212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:38,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:38,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622712534] [2022-11-03 02:45:38,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:38,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:38,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:38,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:38,651 INFO L87 Difference]: Start difference. First operand 1046 states and 1561 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 02:45:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:38,847 INFO L93 Difference]: Finished difference Result 3103 states and 4706 transitions. [2022-11-03 02:45:38,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:38,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 108 [2022-11-03 02:45:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:38,861 INFO L225 Difference]: With dead ends: 3103 [2022-11-03 02:45:38,861 INFO L226 Difference]: Without dead ends: 2062 [2022-11-03 02:45:38,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 02:45:38,868 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 198 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:38,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 405 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-11-03 02:45:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 2050. [2022-11-03 02:45:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1683 states have (on average 1.4896019013666073) internal successors, (2507), 1693 states have internal predecessors, (2507), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-11-03 02:45:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3045 transitions. [2022-11-03 02:45:38,997 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3045 transitions. Word has length 108 [2022-11-03 02:45:38,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:38,999 INFO L495 AbstractCegarLoop]: Abstraction has 2050 states and 3045 transitions. [2022-11-03 02:45:39,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 02:45:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3045 transitions. [2022-11-03 02:45:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:45:39,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:39,007 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] [2022-11-03 02:45:39,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:39,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:39,222 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1354094636, now seen corresponding path program 1 times [2022-11-03 02:45:39,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:39,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938547379] [2022-11-03 02:45:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:39,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:45:39,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938547379] [2022-11-03 02:45:39,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938547379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678150373] [2022-11-03 02:45:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:39,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:39,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:39,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:39,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:45:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:39,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:45:39,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:39,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678150373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:39,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:39,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:39,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999408864] [2022-11-03 02:45:39,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:39,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:39,599 INFO L87 Difference]: Start difference. First operand 2050 states and 3045 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 02:45:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:39,877 INFO L93 Difference]: Finished difference Result 6091 states and 9190 transitions. [2022-11-03 02:45:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 108 [2022-11-03 02:45:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:39,898 INFO L225 Difference]: With dead ends: 6091 [2022-11-03 02:45:39,898 INFO L226 Difference]: Without dead ends: 4046 [2022-11-03 02:45:39,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 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 02:45:39,906 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 183 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:39,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 372 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2022-11-03 02:45:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 4026. [2022-11-03 02:45:40,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3315 states have (on average 1.4826546003016592) internal successors, (4915), 3333 states have internal predecessors, (4915), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-11-03 02:45:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 5949 transitions. [2022-11-03 02:45:40,170 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 5949 transitions. Word has length 108 [2022-11-03 02:45:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:40,171 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 5949 transitions. [2022-11-03 02:45:40,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 02:45:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 5949 transitions. [2022-11-03 02:45:40,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:45:40,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:40,181 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] [2022-11-03 02:45:40,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:40,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:40,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:40,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash 430755468, now seen corresponding path program 1 times [2022-11-03 02:45:40,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:40,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467911903] [2022-11-03 02:45:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:40,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:40,530 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 02:45:40,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467911903] [2022-11-03 02:45:40,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467911903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:40,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:40,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:40,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620510958] [2022-11-03 02:45:40,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:40,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:40,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:40,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:40,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:40,534 INFO L87 Difference]: Start difference. First operand 4026 states and 5949 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (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 02:45:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:40,846 INFO L93 Difference]: Finished difference Result 7150 states and 10752 transitions. [2022-11-03 02:45:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:40,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (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 108 [2022-11-03 02:45:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:40,877 INFO L225 Difference]: With dead ends: 7150 [2022-11-03 02:45:40,877 INFO L226 Difference]: Without dead ends: 5082 [2022-11-03 02:45:40,883 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 02:45:40,884 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 92 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:40,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 469 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:40,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2022-11-03 02:45:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 4746. [2022-11-03 02:45:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4746 states, 4003 states have (on average 1.5236072945291033) internal successors, (6099), 4021 states have internal predecessors, (6099), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-03 02:45:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4746 states to 4746 states and 7165 transitions. [2022-11-03 02:45:41,182 INFO L78 Accepts]: Start accepts. Automaton has 4746 states and 7165 transitions. Word has length 108 [2022-11-03 02:45:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:41,182 INFO L495 AbstractCegarLoop]: Abstraction has 4746 states and 7165 transitions. [2022-11-03 02:45:41,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (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 02:45:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4746 states and 7165 transitions. [2022-11-03 02:45:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:45:41,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:41,197 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] [2022-11-03 02:45:41,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:45:41,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:41,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1762097097, now seen corresponding path program 1 times [2022-11-03 02:45:41,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:41,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54622636] [2022-11-03 02:45:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:41,327 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 02:45:41,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54622636] [2022-11-03 02:45:41,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54622636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:41,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:41,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496910340] [2022-11-03 02:45:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:41,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:41,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:41,333 INFO L87 Difference]: Start difference. First operand 4746 states and 7165 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:41,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:41,974 INFO L93 Difference]: Finished difference Result 14083 states and 21510 transitions. [2022-11-03 02:45:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:41,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 146 [2022-11-03 02:45:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:42,020 INFO L225 Difference]: With dead ends: 14083 [2022-11-03 02:45:42,020 INFO L226 Difference]: Without dead ends: 9342 [2022-11-03 02:45:42,032 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 02:45:42,033 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 185 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:42,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 374 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9342 states. [2022-11-03 02:45:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9342 to 9290. [2022-11-03 02:45:42,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9290 states, 7843 states have (on average 1.5140889965574398) internal successors, (11875), 7877 states have internal predecessors, (11875), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-11-03 02:45:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9290 states to 9290 states and 13933 transitions. [2022-11-03 02:45:42,571 INFO L78 Accepts]: Start accepts. Automaton has 9290 states and 13933 transitions. Word has length 146 [2022-11-03 02:45:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:42,572 INFO L495 AbstractCegarLoop]: Abstraction has 9290 states and 13933 transitions. [2022-11-03 02:45:42,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 9290 states and 13933 transitions. [2022-11-03 02:45:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:45:42,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:42,601 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] [2022-11-03 02:45:42,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:45:42,602 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash 778233338, now seen corresponding path program 1 times [2022-11-03 02:45:42,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:42,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969943542] [2022-11-03 02:45:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:42,752 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 02:45:42,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:42,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969943542] [2022-11-03 02:45:42,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969943542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:42,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:42,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:42,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891459418] [2022-11-03 02:45:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:42,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:42,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:42,755 INFO L87 Difference]: Start difference. First operand 9290 states and 13933 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:43,894 INFO L93 Difference]: Finished difference Result 27571 states and 41814 transitions. [2022-11-03 02:45:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 146 [2022-11-03 02:45:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:43,985 INFO L225 Difference]: With dead ends: 27571 [2022-11-03 02:45:43,985 INFO L226 Difference]: Without dead ends: 18286 [2022-11-03 02:45:44,017 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 02:45:44,017 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 187 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:44,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 374 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18286 states. [2022-11-03 02:45:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18286 to 18186. [2022-11-03 02:45:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18186 states, 15363 states have (on average 1.5040682158432597) internal successors, (23107), 15429 states have internal predecessors, (23107), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-11-03 02:45:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18186 states to 18186 states and 27085 transitions. [2022-11-03 02:45:45,003 INFO L78 Accepts]: Start accepts. Automaton has 18186 states and 27085 transitions. Word has length 146 [2022-11-03 02:45:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:45,004 INFO L495 AbstractCegarLoop]: Abstraction has 18186 states and 27085 transitions. [2022-11-03 02:45:45,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 18186 states and 27085 transitions. [2022-11-03 02:45:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:45:45,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:45,062 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] [2022-11-03 02:45:45,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:45:45,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash 541663075, now seen corresponding path program 1 times [2022-11-03 02:45:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:45,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048767425] [2022-11-03 02:45:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:45,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:45,159 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 02:45:45,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:45,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048767425] [2022-11-03 02:45:45,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048767425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:45,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:45,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924336228] [2022-11-03 02:45:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:45,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:45,162 INFO L87 Difference]: Start difference. First operand 18186 states and 27085 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:47,062 INFO L93 Difference]: Finished difference Result 53971 states and 81238 transitions. [2022-11-03 02:45:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 146 [2022-11-03 02:45:47,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:47,241 INFO L225 Difference]: With dead ends: 53971 [2022-11-03 02:45:47,241 INFO L226 Difference]: Without dead ends: 35790 [2022-11-03 02:45:47,300 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 02:45:47,301 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 189 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:47,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 374 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:47,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35790 states. [2022-11-03 02:45:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35790 to 35594. [2022-11-03 02:45:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35594 states, 30083 states have (on average 1.49356779576505) internal successors, (44931), 30213 states have internal predecessors, (44931), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-11-03 02:45:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35594 states to 35594 states and 52621 transitions. [2022-11-03 02:45:49,302 INFO L78 Accepts]: Start accepts. Automaton has 35594 states and 52621 transitions. Word has length 146 [2022-11-03 02:45:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:49,303 INFO L495 AbstractCegarLoop]: Abstraction has 35594 states and 52621 transitions. [2022-11-03 02:45:49,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 35594 states and 52621 transitions. [2022-11-03 02:45:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 02:45:49,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:49,402 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] [2022-11-03 02:45:49,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:45:49,402 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:49,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash -979023040, now seen corresponding path program 1 times [2022-11-03 02:45:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:49,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349305402] [2022-11-03 02:45:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:49,518 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 02:45:49,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:49,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349305402] [2022-11-03 02:45:49,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349305402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:49,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:49,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147607808] [2022-11-03 02:45:49,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:49,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:49,523 INFO L87 Difference]: Start difference. First operand 35594 states and 52621 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:52,937 INFO L93 Difference]: Finished difference Result 105619 states and 157718 transitions. [2022-11-03 02:45:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:52,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 146 [2022-11-03 02:45:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:53,479 INFO L225 Difference]: With dead ends: 105619 [2022-11-03 02:45:53,479 INFO L226 Difference]: Without dead ends: 70030 [2022-11-03 02:45:53,580 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 02:45:53,581 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 192 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:53,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 388 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:45:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70030 states. [2022-11-03 02:45:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70030 to 69642. [2022-11-03 02:45:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69642 states, 58883 states have (on average 1.4825841074673505) internal successors, (87299), 59141 states have internal predecessors, (87299), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-03 02:45:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69642 states to 69642 states and 102157 transitions. [2022-11-03 02:45:57,311 INFO L78 Accepts]: Start accepts. Automaton has 69642 states and 102157 transitions. Word has length 146 [2022-11-03 02:45:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:57,312 INFO L495 AbstractCegarLoop]: Abstraction has 69642 states and 102157 transitions. [2022-11-03 02:45:57,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 02:45:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 69642 states and 102157 transitions. [2022-11-03 02:45:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:45:57,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:57,574 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:45:57,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 209966091, now seen corresponding path program 1 times [2022-11-03 02:45:57,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:57,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323495043] [2022-11-03 02:45:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:57,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 02:45:58,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323495043] [2022-11-03 02:45:58,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323495043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:58,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543540902] [2022-11-03 02:45:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:58,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:58,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:58,128 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:58,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:45:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:58,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:45:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:45:58,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:58,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543540902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:58,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:58,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:45:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472354278] [2022-11-03 02:45:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:58,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:58,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:45:58,913 INFO L87 Difference]: Start difference. First operand 69642 states and 102157 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:46:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:01,736 INFO L93 Difference]: Finished difference Result 105490 states and 157203 transitions. [2022-11-03 02:46:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:01,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-11-03 02:46:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:02,114 INFO L225 Difference]: With dead ends: 105490 [2022-11-03 02:46:02,114 INFO L226 Difference]: Without dead ends: 69902 [2022-11-03 02:46:02,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:02,233 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 171 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:02,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 516 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69902 states. [2022-11-03 02:46:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69902 to 69386. [2022-11-03 02:46:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69386 states, 58627 states have (on average 1.467224998720726) internal successors, (86019), 58885 states have internal predecessors, (86019), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-03 02:46:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69386 states to 69386 states and 100877 transitions. [2022-11-03 02:46:06,088 INFO L78 Accepts]: Start accepts. Automaton has 69386 states and 100877 transitions. Word has length 167 [2022-11-03 02:46:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:06,088 INFO L495 AbstractCegarLoop]: Abstraction has 69386 states and 100877 transitions. [2022-11-03 02:46:06,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 02:46:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 69386 states and 100877 transitions. [2022-11-03 02:46:06,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:46:06,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:06,920 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:06,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:46:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:07,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:07,147 INFO L85 PathProgramCache]: Analyzing trace with hash 276698603, now seen corresponding path program 1 times [2022-11-03 02:46:07,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:07,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126878134] [2022-11-03 02:46:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:07,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-03 02:46:07,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:07,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126878134] [2022-11-03 02:46:07,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126878134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:07,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862605437] [2022-11-03 02:46:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:07,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:07,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:07,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:07,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:46:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:46:07,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:46:07,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:07,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862605437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:07,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:07,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:46:07,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950703875] [2022-11-03 02:46:07,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:07,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:07,959 INFO L87 Difference]: Start difference. First operand 69386 states and 100877 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:11,150 INFO L93 Difference]: Finished difference Result 105106 states and 155283 transitions. [2022-11-03 02:46:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:11,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-11-03 02:46:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:11,444 INFO L225 Difference]: With dead ends: 105106 [2022-11-03 02:46:11,445 INFO L226 Difference]: Without dead ends: 69646 [2022-11-03 02:46:11,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:11,576 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 191 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:11,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 510 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69646 states. [2022-11-03 02:46:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69646 to 69130. [2022-11-03 02:46:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69130 states, 58371 states have (on average 1.4517311678744582) internal successors, (84739), 58629 states have internal predecessors, (84739), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-11-03 02:46:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69130 states to 69130 states and 99597 transitions. [2022-11-03 02:46:15,046 INFO L78 Accepts]: Start accepts. Automaton has 69130 states and 99597 transitions. Word has length 167 [2022-11-03 02:46:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:46:15,046 INFO L495 AbstractCegarLoop]: Abstraction has 69130 states and 99597 transitions. [2022-11-03 02:46:15,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:15,047 INFO L276 IsEmpty]: Start isEmpty. Operand 69130 states and 99597 transitions. [2022-11-03 02:46:15,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:46:15,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:46:15,252 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:46:15,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-03 02:46:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:46:15,466 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:46:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:46:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1862754292, now seen corresponding path program 1 times [2022-11-03 02:46:15,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:46:15,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561151046] [2022-11-03 02:46:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:46:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:46:15,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:46:15,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561151046] [2022-11-03 02:46:15,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561151046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:46:15,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464595234] [2022-11-03 02:46:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:46:15,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:46:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:46:15,915 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:46:15,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e242454-b73d-4e0f-a5bd-7b2fa936fc7b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:46:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:46:16,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:46:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:46:16,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:46:16,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464595234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:46:16,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:46:16,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:46:16,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645131457] [2022-11-03 02:46:16,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:46:16,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:46:16,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:46:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:46:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:16,223 INFO L87 Difference]: Start difference. First operand 69130 states and 99597 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:46:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:46:19,552 INFO L93 Difference]: Finished difference Result 122888 states and 174346 transitions. [2022-11-03 02:46:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:46:19,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-11-03 02:46:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:46:19,790 INFO L225 Difference]: With dead ends: 122888 [2022-11-03 02:46:19,790 INFO L226 Difference]: Without dead ends: 87812 [2022-11-03 02:46:19,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:46:19,876 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 189 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:46:19,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 258 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:46:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87812 states.