./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba --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 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc --- 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-b5237d8 [2022-11-22 00:30:17,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:30:17,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:30:17,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:30:17,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:30:17,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:30:17,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:30:17,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:30:17,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:30:17,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:30:17,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:30:17,732 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:30:17,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:30:17,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:30:17,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:30:17,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:30:17,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:30:17,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:30:17,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:30:17,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:30:17,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:30:17,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:30:17,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:30:17,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:30:17,768 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:30:17,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:30:17,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:30:17,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:30:17,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:30:17,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:30:17,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:30:17,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:30:17,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:30:17,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:30:17,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:30:17,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:30:17,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:30:17,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:30:17,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:30:17,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:30:17,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:30:17,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-22 00:30:17,826 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:30:17,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:30:17,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:30:17,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:30:17,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:30:17,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:30:17,829 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:30:17,829 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:30:17,829 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:30:17,830 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:30:17,831 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:30:17,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:30:17,831 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:30:17,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:30:17,832 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:30:17,832 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:30:17,832 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:30:17,832 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:30:17,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:30:17,833 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:30:17,833 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:30:17,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:30:17,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:30:17,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:30:17,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:30:17,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:30:17,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:30:17,835 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-22 00:30:17,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:30:17,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:30:17,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:30:17,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:30:17,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:30:17,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:30:17,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:30:17,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:30:17,837 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:30:17,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:30:17,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:30:17,838 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:30:17,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:30:17,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:30:17,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:30:17,839 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_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f59481c49375d27b8409383d6d600e90e5ee29536655deda4d0ae0ca7faefc [2022-11-22 00:30:18,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:30:18,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:30:18,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:30:18,192 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:30:18,192 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:30:18,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2022-11-22 00:30:21,148 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:30:21,442 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:30:21,442 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2022-11-22 00:30:21,456 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/data/3e86f12bb/fa663de4f66e479d8bcf9575b18c384f/FLAG42a2715de [2022-11-22 00:30:21,471 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/data/3e86f12bb/fa663de4f66e479d8bcf9575b18c384f [2022-11-22 00:30:21,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:30:21,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:30:21,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:30:21,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:30:21,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:30:21,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:30:21" (1/1) ... [2022-11-22 00:30:21,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231af6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:21, skipping insertion in model container [2022-11-22 00:30:21,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:30:21" (1/1) ... [2022-11-22 00:30:21,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:30:21,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:30:21,999 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_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2022-11-22 00:30:22,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:30:22,030 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:30:22,093 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_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31164,31177] [2022-11-22 00:30:22,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:30:22,149 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:30:22,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22 WrapperNode [2022-11-22 00:30:22,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:30:22,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:30:22,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:30:22,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:30:22,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,215 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 197 [2022-11-22 00:30:22,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:30:22,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:30:22,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:30:22,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:30:22,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,270 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:30:22,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:30:22,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:30:22,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:30:22,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (1/1) ... [2022-11-22 00:30:22,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:30:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:30:22,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:30:22,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f5f7bd0-e1e6-4f95-a016-1e4074bb4cce/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:30:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:30:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-22 00:30:22,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-22 00:30:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:30:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:30:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:30:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:30:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:30:22,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:30:22,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:30:22,354 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 00:30:22,522 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:30:22,524 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:30:22,980 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:30:23,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:30:23,183 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 00:30:23,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:30:23 BoogieIcfgContainer [2022-11-22 00:30:23,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:30:23,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:30:23,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:30:23,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:30:23,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:30:21" (1/3) ... [2022-11-22 00:30:23,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2b89ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:30:23, skipping insertion in model container [2022-11-22 00:30:23,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:30:22" (2/3) ... [2022-11-22 00:30:23,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f2b89ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:30:23, skipping insertion in model container [2022-11-22 00:30:23,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:30:23" (3/3) ... [2022-11-22 00:30:23,199 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2022-11-22 00:30:23,209 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-22 00:30:23,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:30:23,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-22 00:30:23,221 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 00:30:23,326 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-22 00:30:23,370 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 00:30:23,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 143 transitions, 291 flow [2022-11-22 00:30:23,394 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 143 transitions, 291 flow [2022-11-22 00:30:23,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 143 transitions, 291 flow [2022-11-22 00:30:23,482 INFO L130 PetriNetUnfolder]: 11/154 cut-off events. [2022-11-22 00:30:23,482 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-22 00:30:23,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 154 events. 11/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 162 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 116. Up to 4 conditions per place. [2022-11-22 00:30:23,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 2884 [2022-11-22 00:30:32,453 INFO L134 LiptonReduction]: Checked pairs total: 3584 [2022-11-22 00:30:32,454 INFO L136 LiptonReduction]: Total number of compositions: 160 [2022-11-22 00:30:32,462 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 32 transitions, 69 flow [2022-11-22 00:30:32,501 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107 states, 86 states have (on average 2.488372093023256) internal successors, (214), 106 states have internal predecessors, (214), 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) [2022-11-22 00:30:32,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:30:32,554 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;@7050d01a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:30:32,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-22 00:30:32,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 86 states have (on average 2.488372093023256) internal successors, (214), 106 states have internal predecessors, (214), 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) [2022-11-22 00:30:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:30:32,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:30:32,563 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-22 00:30:32,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2022-11-22 00:30:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:30:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 716780554, now seen corresponding path program 1 times [2022-11-22 00:30:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:30:32,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410010925] [2022-11-22 00:30:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:30:32,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:30:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 00:30:32,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 00:30:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 00:30:32,789 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 00:30:32,791 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 00:30:32,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 21 remaining) [2022-11-22 00:30:32,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 21 remaining) [2022-11-22 00:30:32,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 21 remaining) [2022-11-22 00:30:32,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 21 remaining) [2022-11-22 00:30:32,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 21 remaining) [2022-11-22 00:30:32,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 21 remaining) [2022-11-22 00:30:32,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 21 remaining) [2022-11-22 00:30:32,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 21 remaining) [2022-11-22 00:30:32,797 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 21 remaining) [2022-11-22 00:30:32,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 21 remaining) [2022-11-22 00:30:32,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 21 remaining) [2022-11-22 00:30:32,798 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 21 remaining) [2022-11-22 00:30:32,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 21 remaining) [2022-11-22 00:30:32,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 21 remaining) [2022-11-22 00:30:32,799 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 21 remaining) [2022-11-22 00:30:32,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 21 remaining) [2022-11-22 00:30:32,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 21 remaining) [2022-11-22 00:30:32,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 21 remaining) [2022-11-22 00:30:32,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 21 remaining) [2022-11-22 00:30:32,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 21 remaining) [2022-11-22 00:30:32,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 21 remaining) [2022-11-22 00:30:32,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:30:32,805 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-22 00:30:32,807 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 00:30:32,808 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-22 00:30:32,867 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-22 00:30:32,873 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 00:30:32,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 247 transitions, 506 flow [2022-11-22 00:30:32,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 247 transitions, 506 flow [2022-11-22 00:30:32,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 247 transitions, 506 flow [2022-11-22 00:30:32,970 INFO L130 PetriNetUnfolder]: 21/271 cut-off events. [2022-11-22 00:30:32,971 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-22 00:30:32,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 271 events. 21/271 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 588 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 219. Up to 6 conditions per place. [2022-11-22 00:30:32,996 INFO L119 LiptonReduction]: Number of co-enabled transitions 27192 [2022-11-22 00:30:42,512 INFO L134 LiptonReduction]: Checked pairs total: 63337 [2022-11-22 00:30:42,512 INFO L136 LiptonReduction]: Total number of compositions: 241 [2022-11-22 00:30:42,519 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 80 places, 89 transitions, 190 flow [2022-11-22 00:30:42,848 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7316 states, 7065 states have (on average 3.2680820948336873) internal successors, (23089), 7315 states have internal predecessors, (23089), 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) [2022-11-22 00:30:42,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:30:42,850 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;@7050d01a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:30:42,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-22 00:30:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand has 7316 states, 7065 states have (on average 3.2680820948336873) internal successors, (23089), 7315 states have internal predecessors, (23089), 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) [2022-11-22 00:30:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 00:30:42,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:30:42,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:30:42,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2022-11-22 00:30:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:30:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash 333758915, now seen corresponding path program 1 times [2022-11-22 00:30:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:30:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645916843] [2022-11-22 00:30:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:30:42,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:30:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:30:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:30:43,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:30:43,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645916843] [2022-11-22 00:30:43,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645916843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:30:43,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:30:43,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:30:43,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128495248] [2022-11-22 00:30:43,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:30:43,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:30:43,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:30:43,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:30:43,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:30:43,159 INFO L87 Difference]: Start difference. First operand has 7316 states, 7065 states have (on average 3.2680820948336873) internal successors, (23089), 7315 states have internal predecessors, (23089), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 00:30:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:30:43,622 INFO L93 Difference]: Finished difference Result 6205 states and 18480 transitions. [2022-11-22 00:30:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:30:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-11-22 00:30:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:30:43,683 INFO L225 Difference]: With dead ends: 6205 [2022-11-22 00:30:43,683 INFO L226 Difference]: Without dead ends: 6205 [2022-11-22 00:30:43,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:30:43,687 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 154 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:30:43,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 50 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:30:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2022-11-22 00:30:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 5655. [2022-11-22 00:30:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5655 states, 5566 states have (on average 3.032698526769673) internal successors, (16880), 5654 states have internal predecessors, (16880), 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) [2022-11-22 00:30:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 16880 transitions. [2022-11-22 00:30:44,051 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 16880 transitions. Word has length 8 [2022-11-22 00:30:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:30:44,051 INFO L495 AbstractCegarLoop]: Abstraction has 5655 states and 16880 transitions. [2022-11-22 00:30:44,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 00:30:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 16880 transitions. [2022-11-22 00:30:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:30:44,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:30:44,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:30:44,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:30:44,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2022-11-22 00:30:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:30:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2049025319, now seen corresponding path program 1 times [2022-11-22 00:30:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:30:44,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669095827] [2022-11-22 00:30:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:30:44,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:30:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:30:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:30:44,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:30:44,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669095827] [2022-11-22 00:30:44,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669095827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:30:44,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:30:44,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:30:44,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214106553] [2022-11-22 00:30:44,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:30:44,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:30:44,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:30:44,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:30:44,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:30:44,227 INFO L87 Difference]: Start difference. First operand 5655 states and 16880 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) [2022-11-22 00:30:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:30:44,494 INFO L93 Difference]: Finished difference Result 6861 states and 20273 transitions. [2022-11-22 00:30:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:30:44,495 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 [2022-11-22 00:30:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:30:44,539 INFO L225 Difference]: With dead ends: 6861 [2022-11-22 00:30:44,540 INFO L226 Difference]: Without dead ends: 6861 [2022-11-22 00:30:44,540 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 [2022-11-22 00:30:44,548 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:30:44,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:30:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6861 states. [2022-11-22 00:30:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6861 to 6841. [2022-11-22 00:30:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6841 states, 6734 states have (on average 3.0044550044550045) internal successors, (20232), 6840 states have internal predecessors, (20232), 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) [2022-11-22 00:30:44,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6841 states to 6841 states and 20232 transitions. [2022-11-22 00:30:44,902 INFO L78 Accepts]: Start accepts. Automaton has 6841 states and 20232 transitions. Word has length 11 [2022-11-22 00:30:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:30:44,903 INFO L495 AbstractCegarLoop]: Abstraction has 6841 states and 20232 transitions. [2022-11-22 00:30:44,904 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) [2022-11-22 00:30:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 6841 states and 20232 transitions. [2022-11-22 00:30:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:30:44,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:30:44,906 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-22 00:30:44,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:30:44,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2022-11-22 00:30:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:30:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash -253858931, now seen corresponding path program 1 times [2022-11-22 00:30:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:30:44,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578144391] [2022-11-22 00:30:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:30:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:30:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 00:30:44,930 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 00:30:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 00:30:44,959 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 00:30:44,959 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 00:30:44,959 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2022-11-22 00:30:44,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 31 remaining) [2022-11-22 00:30:44,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 31 remaining) [2022-11-22 00:30:44,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 31 remaining) [2022-11-22 00:30:44,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 31 remaining) [2022-11-22 00:30:44,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 31 remaining) [2022-11-22 00:30:44,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 31 remaining) [2022-11-22 00:30:44,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 31 remaining) [2022-11-22 00:30:44,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 31 remaining) [2022-11-22 00:30:44,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 31 remaining) [2022-11-22 00:30:44,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 31 remaining) [2022-11-22 00:30:44,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 31 remaining) [2022-11-22 00:30:44,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 31 remaining) [2022-11-22 00:30:44,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 31 remaining) [2022-11-22 00:30:44,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 31 remaining) [2022-11-22 00:30:44,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 31 remaining) [2022-11-22 00:30:44,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 31 remaining) [2022-11-22 00:30:44,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 31 remaining) [2022-11-22 00:30:44,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 31 remaining) [2022-11-22 00:30:44,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 31 remaining) [2022-11-22 00:30:44,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 31 remaining) [2022-11-22 00:30:44,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 31 remaining) [2022-11-22 00:30:44,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 31 remaining) [2022-11-22 00:30:44,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 31 remaining) [2022-11-22 00:30:44,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 31 remaining) [2022-11-22 00:30:44,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 31 remaining) [2022-11-22 00:30:44,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 31 remaining) [2022-11-22 00:30:44,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 31 remaining) [2022-11-22 00:30:44,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 31 remaining) [2022-11-22 00:30:44,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 31 remaining) [2022-11-22 00:30:44,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 31 remaining) [2022-11-22 00:30:44,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:30:44,978 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-22 00:30:44,979 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 00:30:44,979 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-22 00:30:45,041 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-22 00:30:45,045 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 00:30:45,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 330 places, 351 transitions, 723 flow [2022-11-22 00:30:45,046 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 330 places, 351 transitions, 723 flow [2022-11-22 00:30:45,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 330 places, 351 transitions, 723 flow [2022-11-22 00:30:45,146 INFO L130 PetriNetUnfolder]: 31/388 cut-off events. [2022-11-22 00:30:45,146 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-22 00:30:45,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 388 events. 31/388 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1180 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 322. Up to 8 conditions per place. [2022-11-22 00:30:45,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 72924 [2022-11-22 00:30:58,225 INFO L134 LiptonReduction]: Checked pairs total: 170986 [2022-11-22 00:30:58,225 INFO L136 LiptonReduction]: Total number of compositions: 343 [2022-11-22 00:30:58,226 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 118 places, 132 transitions, 285 flow [2022-11-22 00:31:06,470 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 263550 states, 260759 states have (on average 4.369045747222531) internal successors, (1139268), 263549 states have internal predecessors, (1139268), 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) [2022-11-22 00:31:06,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:31:06,477 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;@7050d01a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:31:06,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-22 00:31:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 263550 states, 260759 states have (on average 4.369045747222531) internal successors, (1139268), 263549 states have internal predecessors, (1139268), 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) [2022-11-22 00:31:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 00:31:07,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:07,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:07,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-22 00:31:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1873267324, now seen corresponding path program 1 times [2022-11-22 00:31:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:07,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439640813] [2022-11-22 00:31:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:07,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:07,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439640813] [2022-11-22 00:31:07,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439640813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:07,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:07,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:31:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539907739] [2022-11-22 00:31:07,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:07,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:31:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:31:07,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:31:08,131 INFO L87 Difference]: Start difference. First operand has 263550 states, 260759 states have (on average 4.369045747222531) internal successors, (1139268), 263549 states have internal predecessors, (1139268), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 00:31:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:13,441 INFO L93 Difference]: Finished difference Result 247763 states and 1010589 transitions. [2022-11-22 00:31:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:31:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-11-22 00:31:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:16,648 INFO L225 Difference]: With dead ends: 247763 [2022-11-22 00:31:16,648 INFO L226 Difference]: Without dead ends: 247763 [2022-11-22 00:31:16,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:31:16,649 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 279 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:16,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 78 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:31:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247763 states. [2022-11-22 00:31:27,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247763 to 216703. [2022-11-22 00:31:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216703 states, 215593 states have (on average 4.11307881053652) internal successors, (886751), 216702 states have internal predecessors, (886751), 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) [2022-11-22 00:31:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216703 states to 216703 states and 886751 transitions. [2022-11-22 00:31:30,167 INFO L78 Accepts]: Start accepts. Automaton has 216703 states and 886751 transitions. Word has length 8 [2022-11-22 00:31:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:30,168 INFO L495 AbstractCegarLoop]: Abstraction has 216703 states and 886751 transitions. [2022-11-22 00:31:30,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-22 00:31:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 216703 states and 886751 transitions. [2022-11-22 00:31:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:31:30,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:30,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:31:30,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:31:30,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2022-11-22 00:31:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2038534630, now seen corresponding path program 1 times [2022-11-22 00:31:30,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:30,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012682821] [2022-11-22 00:31:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:30,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:31:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:31:30,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:31:30,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012682821] [2022-11-22 00:31:30,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012682821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:31:30,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:31:30,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:31:30,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63708764] [2022-11-22 00:31:30,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:31:30,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:31:30,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:30,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:31:30,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:31:30,237 INFO L87 Difference]: Start difference. First operand 216703 states and 886751 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) [2022-11-22 00:31:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:33,761 INFO L93 Difference]: Finished difference Result 181875 states and 747383 transitions. [2022-11-22 00:31:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:31:33,761 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 [2022-11-22 00:31:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:35,066 INFO L225 Difference]: With dead ends: 181875 [2022-11-22 00:31:35,066 INFO L226 Difference]: Without dead ends: 181875 [2022-11-22 00:31:35,066 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 [2022-11-22 00:31:35,067 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:35,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 10 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:31:35,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181875 states. [2022-11-22 00:31:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181875 to 181875. [2022-11-22 00:31:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181875 states, 181291 states have (on average 4.1225598623207995) internal successors, (747383), 181874 states have internal predecessors, (747383), 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)