./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:57:15,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:57:15,920 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 04:57:15,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:57:15,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:57:15,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:57:15,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:57:15,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:57:15,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:57:15,983 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:57:15,984 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:57:15,984 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:57:15,985 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:57:15,986 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:57:15,987 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:57:15,987 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:57:15,988 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:57:15,988 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:57:15,989 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:57:15,989 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:57:15,989 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:57:15,990 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:57:15,991 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:57:15,992 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:57:15,992 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:57:15,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:57:15,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:57:15,994 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:57:15,994 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:57:15,994 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:57:15,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:57:15,996 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:57:15,996 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:57:15,996 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:57:15,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:57:15,997 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:57:15,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:57:15,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:57:15,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:57:15,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:57:15,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:57:15,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:57:15,999 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:57:15,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:57:16,000 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:57:16,000 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:57:16,001 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:57:16,001 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2023-11-19 04:57:16,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:57:16,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:57:16,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:57:16,262 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:57:16,262 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:57:16,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-19 04:57:19,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:57:19,770 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:57:19,770 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-11-19 04:57:19,786 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/data/42ddecec8/819410513b024eeca46832f3315e4c3b/FLAGbe3996300 [2023-11-19 04:57:19,799 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/data/42ddecec8/819410513b024eeca46832f3315e4c3b [2023-11-19 04:57:19,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:57:19,802 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:57:19,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:57:19,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:57:19,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:57:19,810 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:19" (1/1) ... [2023-11-19 04:57:19,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ec79d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:19, skipping insertion in model container [2023-11-19 04:57:19,811 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:19" (1/1) ... [2023-11-19 04:57:19,854 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:57:20,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:57:20,256 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:57:20,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:57:20,384 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:57:20,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20 WrapperNode [2023-11-19 04:57:20,384 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:57:20,387 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:57:20,387 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:57:20,387 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:57:20,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,442 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-11-19 04:57:20,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:57:20,443 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:57:20,444 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:57:20,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:57:20,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,455 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,462 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,466 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,468 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:57:20,481 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:57:20,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:57:20,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:57:20,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (1/1) ... [2023-11-19 04:57:20,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:57:20,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:20,527 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:57:20,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:57:20,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:57:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:57:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 04:57:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:57:20,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:57:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 04:57:20,560 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 04:57:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:57:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:57:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:57:20,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:57:20,562 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 04:57:20,691 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:57:20,693 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:57:20,904 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:57:20,919 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:57:20,920 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-19 04:57:20,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:20 BoogieIcfgContainer [2023-11-19 04:57:20,924 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:57:20,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:57:20,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:57:20,931 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:57:20,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:57:19" (1/3) ... [2023-11-19 04:57:20,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5b170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:20, skipping insertion in model container [2023-11-19 04:57:20,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:20" (2/3) ... [2023-11-19 04:57:20,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df5b170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:20, skipping insertion in model container [2023-11-19 04:57:20,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:20" (3/3) ... [2023-11-19 04:57:20,935 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-11-19 04:57:20,944 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 04:57:20,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:57:20,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 04:57:20,955 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 04:57:21,086 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:57:21,124 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:57:21,142 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 116 transitions, 236 flow [2023-11-19 04:57:21,146 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 116 transitions, 236 flow [2023-11-19 04:57:21,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 116 transitions, 236 flow [2023-11-19 04:57:21,232 INFO L124 PetriNetUnfolderBase]: 16/152 cut-off events. [2023-11-19 04:57:21,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 04:57:21,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 152 events. 16/152 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 372 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 85. Up to 4 conditions per place. [2023-11-19 04:57:21,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 3680 [2023-11-19 04:57:26,079 INFO L134 LiptonReduction]: Checked pairs total: 6021 [2023-11-19 04:57:26,080 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-11-19 04:57:26,090 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 35 transitions, 74 flow [2023-11-19 04:57:26,127 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 159 states, 140 states have (on average 2.7857142857142856) internal successors, (390), 158 states have internal predecessors, (390), 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) [2023-11-19 04:57:26,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:57:26,156 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=LoopHeads, 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;@51c3b2f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:57:26,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-19 04:57:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 140 states have (on average 2.7857142857142856) internal successors, (390), 158 states have internal predecessors, (390), 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) [2023-11-19 04:57:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:57:26,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:26,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:57:26,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-19 04:57:26,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 14367676, now seen corresponding path program 1 times [2023-11-19 04:57:26,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:26,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431081312] [2023-11-19 04:57:26,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:26,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:26,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:26,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431081312] [2023-11-19 04:57:26,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431081312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:26,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:26,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:57:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300980762] [2023-11-19 04:57:26,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:26,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:26,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:26,613 INFO L87 Difference]: Start difference. First operand has 159 states, 140 states have (on average 2.7857142857142856) internal successors, (390), 158 states have internal predecessors, (390), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-19 04:57:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:26,732 INFO L93 Difference]: Finished difference Result 127 states and 227 transitions. [2023-11-19 04:57:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-19 04:57:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:26,757 INFO L225 Difference]: With dead ends: 127 [2023-11-19 04:57:26,757 INFO L226 Difference]: Without dead ends: 115 [2023-11-19 04:57:26,759 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 [2023-11-19 04:57:26,765 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:26,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-19 04:57:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-11-19 04:57:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 106 states have (on average 1.9150943396226414) internal successors, (203), 114 states have internal predecessors, (203), 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) [2023-11-19 04:57:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 203 transitions. [2023-11-19 04:57:26,833 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 203 transitions. Word has length 4 [2023-11-19 04:57:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:26,834 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 203 transitions. [2023-11-19 04:57:26,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-19 04:57:26,839 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 203 transitions. [2023-11-19 04:57:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:57:26,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:26,840 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 04:57:26,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:57:26,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-19 04:57:26,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash 922459991, now seen corresponding path program 1 times [2023-11-19 04:57:26,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:26,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550106325] [2023-11-19 04:57:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:26,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:57:26,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:57:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:57:26,983 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:57:26,983 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:57:26,985 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2023-11-19 04:57:26,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 11 remaining) [2023-11-19 04:57:26,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 11 remaining) [2023-11-19 04:57:26,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 11 remaining) [2023-11-19 04:57:26,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 11 remaining) [2023-11-19 04:57:26,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 11 remaining) [2023-11-19 04:57:26,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 11 remaining) [2023-11-19 04:57:26,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 11 remaining) [2023-11-19 04:57:26,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 11 remaining) [2023-11-19 04:57:27,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 11 remaining) [2023-11-19 04:57:27,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 11 remaining) [2023-11-19 04:57:27,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:57:27,004 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 04:57:27,006 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 04:57:27,006 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 04:57:27,032 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:57:27,036 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:57:27,037 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 157 transitions, 324 flow [2023-11-19 04:57:27,037 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 157 transitions, 324 flow [2023-11-19 04:57:27,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 157 transitions, 324 flow [2023-11-19 04:57:27,091 INFO L124 PetriNetUnfolderBase]: 27/238 cut-off events. [2023-11-19 04:57:27,091 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 04:57:27,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 238 events. 27/238 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 712 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 153. Up to 6 conditions per place. [2023-11-19 04:57:27,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 10640 [2023-11-19 04:57:32,211 INFO L134 LiptonReduction]: Checked pairs total: 20658 [2023-11-19 04:57:32,212 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-11-19 04:57:32,213 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 58 transitions, 126 flow [2023-11-19 04:57:32,392 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2971 states, 2858 states have (on average 3.884884534639608) internal successors, (11103), 2970 states have internal predecessors, (11103), 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) [2023-11-19 04:57:32,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:57:32,395 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=LoopHeads, 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;@51c3b2f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:57:32,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-19 04:57:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 2971 states, 2858 states have (on average 3.884884534639608) internal successors, (11103), 2970 states have internal predecessors, (11103), 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) [2023-11-19 04:57:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:57:32,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:32,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:57:32,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-11-19 04:57:32,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 787288941, now seen corresponding path program 1 times [2023-11-19 04:57:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514038341] [2023-11-19 04:57:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:32,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:32,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514038341] [2023-11-19 04:57:32,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514038341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:32,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:32,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:57:32,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318625232] [2023-11-19 04:57:32,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:32,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:32,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:32,506 INFO L87 Difference]: Start difference. First operand has 2971 states, 2858 states have (on average 3.884884534639608) internal successors, (11103), 2970 states have internal predecessors, (11103), 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 3 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) [2023-11-19 04:57:32,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:32,694 INFO L93 Difference]: Finished difference Result 2939 states and 8071 transitions. [2023-11-19 04:57:32,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2023-11-19 04:57:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:32,728 INFO L225 Difference]: With dead ends: 2939 [2023-11-19 04:57:32,728 INFO L226 Difference]: Without dead ends: 2867 [2023-11-19 04:57:32,728 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 [2023-11-19 04:57:32,730 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:32,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2023-11-19 04:57:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2867. [2023-11-19 04:57:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2764 states have (on average 2.8462373371924747) internal successors, (7867), 2866 states have internal predecessors, (7867), 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) [2023-11-19 04:57:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 7867 transitions. [2023-11-19 04:57:32,938 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 7867 transitions. Word has length 5 [2023-11-19 04:57:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:32,938 INFO L495 AbstractCegarLoop]: Abstraction has 2867 states and 7867 transitions. [2023-11-19 04:57:32,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-19 04:57:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 7867 transitions. [2023-11-19 04:57:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:57:32,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:32,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:57:32,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-11-19 04:57:32,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:32,944 INFO L85 PathProgramCache]: Analyzing trace with hash 676868729, now seen corresponding path program 1 times [2023-11-19 04:57:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:32,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751098269] [2023-11-19 04:57:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:32,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:33,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:33,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751098269] [2023-11-19 04:57:33,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751098269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:33,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:33,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:33,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949226858] [2023-11-19 04:57:33,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:33,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:57:33,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:57:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:33,388 INFO L87 Difference]: Start difference. First operand 2867 states and 7867 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-19 04:57:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:33,597 INFO L93 Difference]: Finished difference Result 2587 states and 7067 transitions. [2023-11-19 04:57:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:57:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-11-19 04:57:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:33,628 INFO L225 Difference]: With dead ends: 2587 [2023-11-19 04:57:33,628 INFO L226 Difference]: Without dead ends: 2587 [2023-11-19 04:57:33,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:33,634 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:33,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 19 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:57:33,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2023-11-19 04:57:33,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 2587. [2023-11-19 04:57:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2502 states have (on average 2.8245403677058354) internal successors, (7067), 2586 states have internal predecessors, (7067), 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) [2023-11-19 04:57:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 7067 transitions. [2023-11-19 04:57:33,762 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 7067 transitions. Word has length 7 [2023-11-19 04:57:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:33,762 INFO L495 AbstractCegarLoop]: Abstraction has 2587 states and 7067 transitions. [2023-11-19 04:57:33,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-19 04:57:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 7067 transitions. [2023-11-19 04:57:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:57:33,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:33,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-19 04:57:33,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:57:33,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-11-19 04:57:33,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 110742295, now seen corresponding path program 1 times [2023-11-19 04:57:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:33,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736798878] [2023-11-19 04:57:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:33,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:33,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:33,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736798878] [2023-11-19 04:57:33,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736798878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:33,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:33,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:33,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938107781] [2023-11-19 04:57:33,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:33,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:33,857 INFO L87 Difference]: Start difference. First operand 2587 states and 7067 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-19 04:57:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:34,006 INFO L93 Difference]: Finished difference Result 2355 states and 6403 transitions. [2023-11-19 04:57:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2023-11-19 04:57:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:34,029 INFO L225 Difference]: With dead ends: 2355 [2023-11-19 04:57:34,030 INFO L226 Difference]: Without dead ends: 2355 [2023-11-19 04:57:34,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:34,031 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:34,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2023-11-19 04:57:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2023-11-19 04:57:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2291 states have (on average 2.7948494107376693) internal successors, (6403), 2354 states have internal predecessors, (6403), 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) [2023-11-19 04:57:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 6403 transitions. [2023-11-19 04:57:34,174 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 6403 transitions. Word has length 9 [2023-11-19 04:57:34,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:34,175 INFO L495 AbstractCegarLoop]: Abstraction has 2355 states and 6403 transitions. [2023-11-19 04:57:34,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-19 04:57:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 6403 transitions. [2023-11-19 04:57:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:57:34,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:34,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-19 04:57:34,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:57:34,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-11-19 04:57:34,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 110742328, now seen corresponding path program 1 times [2023-11-19 04:57:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:34,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893986064] [2023-11-19 04:57:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:57:34,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:34,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893986064] [2023-11-19 04:57:34,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893986064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:34,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:34,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:34,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712824686] [2023-11-19 04:57:34,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:34,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:34,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:34,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:34,226 INFO L87 Difference]: Start difference. First operand 2355 states and 6403 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-19 04:57:34,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:34,351 INFO L93 Difference]: Finished difference Result 2123 states and 5739 transitions. [2023-11-19 04:57:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:34,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2023-11-19 04:57:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:34,372 INFO L225 Difference]: With dead ends: 2123 [2023-11-19 04:57:34,373 INFO L226 Difference]: Without dead ends: 2123 [2023-11-19 04:57:34,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:34,374 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:34,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 10 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2023-11-19 04:57:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2023-11-19 04:57:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2080 states have (on average 2.7591346153846152) internal successors, (5739), 2122 states have internal predecessors, (5739), 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) [2023-11-19 04:57:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 5739 transitions. [2023-11-19 04:57:34,469 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 5739 transitions. Word has length 9 [2023-11-19 04:57:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:34,470 INFO L495 AbstractCegarLoop]: Abstraction has 2123 states and 5739 transitions. [2023-11-19 04:57:34,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-19 04:57:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 5739 transitions. [2023-11-19 04:57:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:57:34,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:34,472 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 04:57:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:57:34,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2023-11-19 04:57:34,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -950759576, now seen corresponding path program 1 times [2023-11-19 04:57:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082850908] [2023-11-19 04:57:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:34,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:57:34,493 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:57:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:57:34,514 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:57:34,514 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:57:34,515 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2023-11-19 04:57:34,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 15 remaining) [2023-11-19 04:57:34,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 15 remaining) [2023-11-19 04:57:34,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 15 remaining) [2023-11-19 04:57:34,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 15 remaining) [2023-11-19 04:57:34,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 15 remaining) [2023-11-19 04:57:34,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 15 remaining) [2023-11-19 04:57:34,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 15 remaining) [2023-11-19 04:57:34,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 15 remaining) [2023-11-19 04:57:34,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 15 remaining) [2023-11-19 04:57:34,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 15 remaining) [2023-11-19 04:57:34,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 15 remaining) [2023-11-19 04:57:34,518 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 15 remaining) [2023-11-19 04:57:34,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 15 remaining) [2023-11-19 04:57:34,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 15 remaining) [2023-11-19 04:57:34,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:57:34,520 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 04:57:34,520 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 04:57:34,520 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 04:57:34,554 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:57:34,558 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:57:34,559 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 182 places, 198 transitions, 414 flow [2023-11-19 04:57:34,559 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 182 places, 198 transitions, 414 flow [2023-11-19 04:57:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 198 transitions, 414 flow [2023-11-19 04:57:34,681 INFO L124 PetriNetUnfolderBase]: 38/324 cut-off events. [2023-11-19 04:57:34,681 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 04:57:34,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 324 events. 38/324 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1047 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 242. Up to 8 conditions per place. [2023-11-19 04:57:34,716 INFO L119 LiptonReduction]: Number of co-enabled transitions 20880 [2023-11-19 04:57:40,643 INFO L134 LiptonReduction]: Checked pairs total: 48799 [2023-11-19 04:57:40,644 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-19 04:57:40,645 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 79 transitions, 176 flow [2023-11-19 04:57:43,707 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 47767 states, 47180 states have (on average 5.016765578635015) internal successors, (236691), 47766 states have internal predecessors, (236691), 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) [2023-11-19 04:57:43,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:57:43,709 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=LoopHeads, 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;@51c3b2f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:57:43,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-19 04:57:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 47767 states, 47180 states have (on average 5.016765578635015) internal successors, (236691), 47766 states have internal predecessors, (236691), 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) [2023-11-19 04:57:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:57:44,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:44,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:57:44,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 04:57:44,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:44,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1200258535, now seen corresponding path program 1 times [2023-11-19 04:57:44,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:44,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476327690] [2023-11-19 04:57:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:44,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:44,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476327690] [2023-11-19 04:57:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476327690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:44,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:57:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378591521] [2023-11-19 04:57:44,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:44,212 INFO L87 Difference]: Start difference. First operand has 47767 states, 47180 states have (on average 5.016765578635015) internal successors, (236691), 47766 states have internal predecessors, (236691), 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 3 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) [2023-11-19 04:57:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:46,360 INFO L93 Difference]: Finished difference Result 47735 states and 175255 transitions. [2023-11-19 04:57:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:46,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2023-11-19 04:57:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:47,299 INFO L225 Difference]: With dead ends: 47735 [2023-11-19 04:57:47,299 INFO L226 Difference]: Without dead ends: 47411 [2023-11-19 04:57:47,300 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 [2023-11-19 04:57:47,300 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:47,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47411 states. [2023-11-19 04:57:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47411 to 47411. [2023-11-19 04:57:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47411 states, 46834 states have (on average 3.7161677413844645) internal successors, (174043), 47410 states have internal predecessors, (174043), 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) [2023-11-19 04:57:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47411 states to 47411 states and 174043 transitions. [2023-11-19 04:57:50,941 INFO L78 Accepts]: Start accepts. Automaton has 47411 states and 174043 transitions. Word has length 5 [2023-11-19 04:57:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:50,941 INFO L495 AbstractCegarLoop]: Abstraction has 47411 states and 174043 transitions. [2023-11-19 04:57:50,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-11-19 04:57:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 47411 states and 174043 transitions. [2023-11-19 04:57:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:57:50,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:50,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:50,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:57:50,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 04:57:50,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1888843458, now seen corresponding path program 1 times [2023-11-19 04:57:50,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:50,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402682050] [2023-11-19 04:57:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:50,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:51,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:51,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402682050] [2023-11-19 04:57:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402682050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:51,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880531384] [2023-11-19 04:57:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:51,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:57:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:51,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:57:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:51,084 INFO L87 Difference]: Start difference. First operand 47411 states and 174043 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-19 04:57:51,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:51,913 INFO L93 Difference]: Finished difference Result 44757 states and 163917 transitions. [2023-11-19 04:57:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:57:51,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-11-19 04:57:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:52,426 INFO L225 Difference]: With dead ends: 44757 [2023-11-19 04:57:52,427 INFO L226 Difference]: Without dead ends: 44757 [2023-11-19 04:57:52,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:57:52,430 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:52,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 21 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44757 states. [2023-11-19 04:57:54,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44757 to 44757. [2023-11-19 04:57:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44757 states, 44226 states have (on average 3.7063492063492065) internal successors, (163917), 44756 states have internal predecessors, (163917), 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) [2023-11-19 04:57:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44757 states to 44757 states and 163917 transitions. [2023-11-19 04:57:55,141 INFO L78 Accepts]: Start accepts. Automaton has 44757 states and 163917 transitions. Word has length 7 [2023-11-19 04:57:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:55,151 INFO L495 AbstractCegarLoop]: Abstraction has 44757 states and 163917 transitions. [2023-11-19 04:57:55,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-11-19 04:57:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 44757 states and 163917 transitions. [2023-11-19 04:57:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:57:55,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:55,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-19 04:57:55,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:57:55,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 04:57:55,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:55,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1680744890, now seen corresponding path program 1 times [2023-11-19 04:57:55,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:55,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902706479] [2023-11-19 04:57:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:55,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:57:55,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:55,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902706479] [2023-11-19 04:57:55,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902706479] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:55,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:55,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:57:55,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405219910] [2023-11-19 04:57:55,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:55,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:55,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:55,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:55,268 INFO L87 Difference]: Start difference. First operand 44757 states and 163917 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-19 04:57:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:55,702 INFO L93 Difference]: Finished difference Result 40647 states and 148509 transitions. [2023-11-19 04:57:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2023-11-19 04:57:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:55,955 INFO L225 Difference]: With dead ends: 40647 [2023-11-19 04:57:55,955 INFO L226 Difference]: Without dead ends: 40647 [2023-11-19 04:57:55,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:55,956 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:55,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 14 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:57:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40647 states. [2023-11-19 04:57:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40647 to 40647. [2023-11-19 04:57:57,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40647 states, 40254 states have (on average 3.68929795796691) internal successors, (148509), 40646 states have internal predecessors, (148509), 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) [2023-11-19 04:57:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40647 states to 40647 states and 148509 transitions. [2023-11-19 04:57:58,277 INFO L78 Accepts]: Start accepts. Automaton has 40647 states and 148509 transitions. Word has length 9 [2023-11-19 04:57:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:58,277 INFO L495 AbstractCegarLoop]: Abstraction has 40647 states and 148509 transitions. [2023-11-19 04:57:58,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2023-11-19 04:57:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 40647 states and 148509 transitions. [2023-11-19 04:57:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:57:58,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:58,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-19 04:57:58,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:57:58,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-11-19 04:57:58,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:58,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1680744847, now seen corresponding path program 1 times [2023-11-19 04:57:58,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:58,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843264403] [2023-11-19 04:57:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:58,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843264403] [2023-11-19 04:57:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843264403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126387102] [2023-11-19 04:57:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:58,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:58,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:58,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04212dc8-e070-4c28-a1f5-57abc73ac578/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:57:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:58,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:57:58,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:57:58,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:57:58,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126387102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:58,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:57:58,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-19 04:57:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246425377] [2023-11-19 04:57:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:58,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:57:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:57:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:58,688 INFO L87 Difference]: Start difference. First operand 40647 states and 148509 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2023-11-19 04:57:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:59,225 INFO L93 Difference]: Finished difference Result 36537 states and 133101 transitions. [2023-11-19 04:57:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:57:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2023-11-19 04:57:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:59,448 INFO L225 Difference]: With dead ends: 36537 [2023-11-19 04:57:59,448 INFO L226 Difference]: Without dead ends: 36537 [2023-11-19 04:57:59,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:59,450 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:59,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 25 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:57:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36537 states. [2023-11-19 04:58:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36537 to 36537. [2023-11-19 04:58:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36537 states, 36282 states have (on average 3.6685133123863074) internal successors, (133101), 36536 states have internal predecessors, (133101), 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)