./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b 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_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 --- 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-6b4ec56 [2022-11-20 21:05:14,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:05:14,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:05:14,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:05:14,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:05:14,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:05:14,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:05:14,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:05:14,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:05:14,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:05:14,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:05:14,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:05:14,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:05:14,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:05:14,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:05:14,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:05:14,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:05:14,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:05:14,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:05:14,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:05:14,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:05:14,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:05:14,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:05:14,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:05:14,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:05:14,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:05:14,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:05:14,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:05:14,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:05:14,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:05:14,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:05:14,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:05:14,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:05:14,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:05:14,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:05:14,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:05:14,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:05:14,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:05:14,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:05:14,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:05:14,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:05:14,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-20 21:05:14,943 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:05:14,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:05:14,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:05:14,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:05:14,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:05:14,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:05:14,946 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:05:14,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:05:14,946 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:05:14,946 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:05:14,948 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:05:14,948 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:05:14,948 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:05:14,948 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:05:14,949 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:05:14,949 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:05:14,949 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:05:14,949 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:05:14,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:05:14,950 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:05:14,951 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:05:14,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:05:14,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:05:14,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:05:14,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:05:14,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:05:14,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:05:14,952 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 21:05:14,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:05:14,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:05:14,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:05:14,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:05:14,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:05:14,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:05:14,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:05:14,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:05:14,955 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:05:14,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:05:14,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:05:14,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:05:14,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:05:14,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:05:14,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:05:14,957 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_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b51332425cd14048935a20a73abea0065b1633fac56d6d6be511ab67585236 [2022-11-20 21:05:15,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:05:15,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:05:15,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:05:15,346 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:05:15,347 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:05:15,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-11-20 21:05:18,804 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:05:19,041 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:05:19,042 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/sv-benchmarks/c/weaver/parallel-barrier.wvr.c [2022-11-20 21:05:19,051 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/data/eb39cc848/6c49966b3de7456dae647ab4ff433fff/FLAGbc7d6013f [2022-11-20 21:05:19,069 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/data/eb39cc848/6c49966b3de7456dae647ab4ff433fff [2022-11-20 21:05:19,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:05:19,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:05:19,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:05:19,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:05:19,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:05:19,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5662d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19, skipping insertion in model container [2022-11-20 21:05:19,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:05:19,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:05:19,437 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-11-20 21:05:19,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:05:19,456 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:05:19,497 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/sv-benchmarks/c/weaver/parallel-barrier.wvr.c[4722,4735] [2022-11-20 21:05:19,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:05:19,517 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:05:19,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19 WrapperNode [2022-11-20 21:05:19,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:05:19,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:05:19,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:05:19,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:05:19,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,585 INFO L138 Inliner]: procedures = 25, calls = 98, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 269 [2022-11-20 21:05:19,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:05:19,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:05:19,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:05:19,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:05:19,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,637 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:05:19,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:05:19,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:05:19,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:05:19,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (1/1) ... [2022-11-20 21:05:19,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:05:19,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:19,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:05:19,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2cf846d-1a72-4ff1-97e9-09e0c129ba93/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:05:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:05:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:05:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:05:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:05:19,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 21:05:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 21:05:19,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 21:05:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 21:05:19,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 21:05:19,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 21:05:19,728 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 21:05:19,728 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 21:05:19,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:05:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-11-20 21:05:19,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-11-20 21:05:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-11-20 21:05:19,729 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-11-20 21:05:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 21:05:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 21:05:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:05:19,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:05:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:05:19,732 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 21:05:19,907 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:05:19,912 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:05:20,443 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:05:20,554 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:05:20,555 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 21:05:20,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:05:20 BoogieIcfgContainer [2022-11-20 21:05:20,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:05:20,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:05:20,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:05:20,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:05:20,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:05:19" (1/3) ... [2022-11-20 21:05:20,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f77fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:05:20, skipping insertion in model container [2022-11-20 21:05:20,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:05:19" (2/3) ... [2022-11-20 21:05:20,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f77fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:05:20, skipping insertion in model container [2022-11-20 21:05:20,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:05:20" (3/3) ... [2022-11-20 21:05:20,570 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-barrier.wvr.c [2022-11-20 21:05:20,581 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 21:05:20,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:05:20,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-20 21:05:20,594 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 21:05:20,760 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-11-20 21:05:20,808 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 21:05:20,827 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 250 transitions, 572 flow [2022-11-20 21:05:20,831 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 250 transitions, 572 flow [2022-11-20 21:05:20,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 250 transitions, 572 flow [2022-11-20 21:05:20,963 INFO L130 PetriNetUnfolder]: 8/222 cut-off events. [2022-11-20 21:05:20,963 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 21:05:20,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 222 events. 8/222 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 341 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 189. Up to 3 conditions per place. [2022-11-20 21:05:20,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 10344 [2022-11-20 21:05:30,425 INFO L134 LiptonReduction]: Checked pairs total: 58128 [2022-11-20 21:05:30,425 INFO L136 LiptonReduction]: Total number of compositions: 201 [2022-11-20 21:05:30,436 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 114 places, 101 transitions, 274 flow [2022-11-20 21:05:36,941 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111682 states, 111054 states have (on average 4.83914131863778) internal successors, (537406), 111681 states have internal predecessors, (537406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:36,994 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:05:37,009 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;@1adc3a28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:05:37,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-20 21:05:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 111682 states, 111054 states have (on average 4.83914131863778) internal successors, (537406), 111681 states have internal predecessors, (537406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:05:37,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:37,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:05:37,221 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-11-20 21:05:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 899637486, now seen corresponding path program 1 times [2022-11-20 21:05:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:05:37,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23303311] [2022-11-20 21:05:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:37,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:05:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:37,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:05:37,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23303311] [2022-11-20 21:05:37,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23303311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:37,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:37,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:05:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699938436] [2022-11-20 21:05:37,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:37,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 21:05:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:05:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 21:05:37,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:05:37,878 INFO L87 Difference]: Start difference. First operand has 111682 states, 111054 states have (on average 4.83914131863778) internal successors, (537406), 111681 states have internal predecessors, (537406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:41,873 INFO L93 Difference]: Finished difference Result 111682 states and 536460 transitions. [2022-11-20 21:05:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 21:05:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:05:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:44,238 INFO L225 Difference]: With dead ends: 111682 [2022-11-20 21:05:44,239 INFO L226 Difference]: Without dead ends: 111178 [2022-11-20 21:05:44,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:05:44,246 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:44,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:05:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111178 states. [2022-11-20 21:05:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111178 to 111178. [2022-11-20 21:05:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111178 states, 110554 states have (on average 4.829847857155779) internal successors, (533959), 111177 states have internal predecessors, (533959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111178 states to 111178 states and 533959 transitions. [2022-11-20 21:05:53,106 INFO L78 Accepts]: Start accepts. Automaton has 111178 states and 533959 transitions. Word has length 5 [2022-11-20 21:05:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:53,106 INFO L495 AbstractCegarLoop]: Abstraction has 111178 states and 533959 transitions. [2022-11-20 21:05:53,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 111178 states and 533959 transitions. [2022-11-20 21:05:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:53,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:53,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:53,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:05:53,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-11-20 21:05:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1215287322, now seen corresponding path program 1 times [2022-11-20 21:05:53,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:05:53,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712079806] [2022-11-20 21:05:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:53,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:05:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:53,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:05:53,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712079806] [2022-11-20 21:05:53,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712079806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:53,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:53,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:53,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342955884] [2022-11-20 21:05:53,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:53,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:05:53,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:05:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:05:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:53,518 INFO L87 Difference]: Start difference. First operand 111178 states and 533959 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:55,801 INFO L93 Difference]: Finished difference Result 88426 states and 416839 transitions. [2022-11-20 21:05:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:56,502 INFO L225 Difference]: With dead ends: 88426 [2022-11-20 21:05:56,502 INFO L226 Difference]: Without dead ends: 88426 [2022-11-20 21:05:56,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:05:56,504 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 154 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:56,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 106 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:05:57,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88426 states. [2022-11-20 21:06:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88426 to 88426. [2022-11-20 21:06:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88426 states, 88002 states have (on average 4.736699165928047) internal successors, (416839), 88425 states have internal predecessors, (416839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:01,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88426 states to 88426 states and 416839 transitions. [2022-11-20 21:06:01,934 INFO L78 Accepts]: Start accepts. Automaton has 88426 states and 416839 transitions. Word has length 9 [2022-11-20 21:06:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:01,935 INFO L495 AbstractCegarLoop]: Abstraction has 88426 states and 416839 transitions. [2022-11-20 21:06:01,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 88426 states and 416839 transitions. [2022-11-20 21:06:01,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:01,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:01,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:01,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:06:01,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-11-20 21:06:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash -980803299, now seen corresponding path program 1 times [2022-11-20 21:06:01,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:06:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506087747] [2022-11-20 21:06:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:01,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:06:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:02,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:06:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506087747] [2022-11-20 21:06:02,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506087747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:02,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:02,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:06:02,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677562081] [2022-11-20 21:06:02,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:02,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:06:02,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:06:02,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:06:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:02,298 INFO L87 Difference]: Start difference. First operand 88426 states and 416839 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:04,528 INFO L93 Difference]: Finished difference Result 64726 states and 301949 transitions. [2022-11-20 21:06:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:06:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:05,080 INFO L225 Difference]: With dead ends: 64726 [2022-11-20 21:06:05,080 INFO L226 Difference]: Without dead ends: 64726 [2022-11-20 21:06:05,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:06:05,082 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 265 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:05,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 74 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:06:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64726 states. [2022-11-20 21:06:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64726 to 64726. [2022-11-20 21:06:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64726 states, 64552 states have (on average 4.677608749535258) internal successors, (301949), 64725 states have internal predecessors, (301949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64726 states to 64726 states and 301949 transitions. [2022-11-20 21:06:08,997 INFO L78 Accepts]: Start accepts. Automaton has 64726 states and 301949 transitions. Word has length 10 [2022-11-20 21:06:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:08,997 INFO L495 AbstractCegarLoop]: Abstraction has 64726 states and 301949 transitions. [2022-11-20 21:06:08,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 64726 states and 301949 transitions. [2022-11-20 21:06:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:06:09,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:09,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:09,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:06:09,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-11-20 21:06:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:09,006 INFO L85 PathProgramCache]: Analyzing trace with hash -340132585, now seen corresponding path program 1 times [2022-11-20 21:06:09,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:06:09,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143656170] [2022-11-20 21:06:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:09,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:06:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:09,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:06:09,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143656170] [2022-11-20 21:06:09,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143656170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:09,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:09,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:09,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752677459] [2022-11-20 21:06:09,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:09,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:06:09,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:09,146 INFO L87 Difference]: Start difference. First operand 64726 states and 301949 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:09,849 INFO L93 Difference]: Finished difference Result 56194 states and 258977 transitions. [2022-11-20 21:06:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:09,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:06:09,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:10,302 INFO L225 Difference]: With dead ends: 56194 [2022-11-20 21:06:10,302 INFO L226 Difference]: Without dead ends: 56194 [2022-11-20 21:06:10,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:10,304 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:10,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 39 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:06:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56194 states. [2022-11-20 21:06:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56194 to 56194. [2022-11-20 21:06:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56194 states, 56045 states have (on average 4.620876081720047) internal successors, (258977), 56193 states have internal predecessors, (258977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56194 states to 56194 states and 258977 transitions. [2022-11-20 21:06:14,535 INFO L78 Accepts]: Start accepts. Automaton has 56194 states and 258977 transitions. Word has length 11 [2022-11-20 21:06:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:14,535 INFO L495 AbstractCegarLoop]: Abstraction has 56194 states and 258977 transitions. [2022-11-20 21:06:14,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 56194 states and 258977 transitions. [2022-11-20 21:06:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:06:14,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:14,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:14,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:06:14,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread5Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-11-20 21:06:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:14,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2069680887, now seen corresponding path program 1 times [2022-11-20 21:06:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:06:14,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046092930] [2022-11-20 21:06:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:14,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:06:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:14,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:06:14,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046092930] [2022-11-20 21:06:14,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046092930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:14,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:14,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:06:14,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640190249] [2022-11-20 21:06:14,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:14,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:06:14,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:06:14,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:06:14,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:06:14,712 INFO L87 Difference]: Start difference. First operand 56194 states and 258977 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:15,403 INFO L93 Difference]: Finished difference Result 44674 states and 201809 transitions. [2022-11-20 21:06:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:06:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:06:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:15,648 INFO L225 Difference]: With dead ends: 44674 [2022-11-20 21:06:15,648 INFO L226 Difference]: Without dead ends: 44674 [2022-11-20 21:06:15,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:06:15,649 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 136 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:15,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 85 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:06:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44674 states. [2022-11-20 21:06:17,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44674 to 44674. [2022-11-20 21:06:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44674 states, 44573 states have (on average 4.5276063984923605) internal successors, (201809), 44673 states have internal predecessors, (201809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44674 states to 44674 states and 201809 transitions. [2022-11-20 21:06:18,831 INFO L78 Accepts]: Start accepts. Automaton has 44674 states and 201809 transitions. Word has length 13 [2022-11-20 21:06:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:18,832 INFO L495 AbstractCegarLoop]: Abstraction has 44674 states and 201809 transitions. [2022-11-20 21:06:18,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 44674 states and 201809 transitions. [2022-11-20 21:06:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:06:18,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:18,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:18,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:06:18,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread5Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 39 more)] === [2022-11-20 21:06:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash 264400275, now seen corresponding path program 1 times [2022-11-20 21:06:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:06:18,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132407921] [2022-11-20 21:06:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:18,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:06:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:18,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:06:18,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132407921] [2022-11-20 21:06:18,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132407921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:18,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:18,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:18,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446428776] [2022-11-20 21:06:18,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:18,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:18,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:06:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:18,931 INFO L87 Difference]: Start difference. First operand 44674 states and 201809 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:19,346 INFO L93 Difference]: Finished difference Result 34594 states and 152747 transitions. [2022-11-20 21:06:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:19,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:06:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:19,531 INFO L225 Difference]: With dead ends: 34594 [2022-11-20 21:06:19,531 INFO L226 Difference]: Without dead ends: 34594 [2022-11-20 21:06:19,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:19,532 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:19,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 37 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:06:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34594 states. [2022-11-20 21:06:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34594 to 34594. [2022-11-20 21:06:21,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34594 states, 34523 states have (on average 4.4244996089563475) internal successors, (152747), 34593 states have internal predecessors, (152747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)