./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:37:44,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:37:44,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:37:44,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:37:44,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:37:44,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:37:44,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:37:44,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:37:44,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:37:44,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:37:44,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:37:44,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:37:44,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:37:44,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:37:44,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:37:44,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:37:44,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:37:44,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:37:44,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:37:44,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:37:44,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:37:44,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:37:44,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:37:44,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:37:44,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:37:44,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:37:44,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:37:44,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:37:44,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:37:44,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:37:44,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:37:44,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:37:44,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:37:44,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:37:44,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:37:44,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:37:44,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:37:44,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:37:44,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:37:44,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:37:44,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:37:44,452 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-23 03:37:44,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:37:44,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:37:44,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:37:44,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:37:44,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:37:44,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:37:44,503 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:37:44,503 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:37:44,503 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:37:44,503 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:37:44,503 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:37:44,504 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:37:44,504 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:37:44,504 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:37:44,504 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:37:44,505 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:37:44,505 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:37:44,505 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:37:44,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:37:44,506 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:37:44,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:37:44,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:37:44,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:37:44,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:37:44,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:37:44,508 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-23 03:37:44,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:37:44,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:37:44,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:37:44,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:37:44,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:37:44,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:37:44,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:37:44,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:37:44,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:37:44,510 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:37:44,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:37:44,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:37:44,511 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:37:44,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:37:44,512 INFO L138 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_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2021-11-23 03:37:44,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:37:44,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:37:44,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:37:44,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:37:44,838 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:37:44,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2021-11-23 03:37:44,912 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/data/44b2375a2/742ec4ac676a4170a0bc1b7aef749630/FLAGd08ec83a6 [2021-11-23 03:37:45,433 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:37:45,434 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2021-11-23 03:37:45,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/data/44b2375a2/742ec4ac676a4170a0bc1b7aef749630/FLAGd08ec83a6 [2021-11-23 03:37:45,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/data/44b2375a2/742ec4ac676a4170a0bc1b7aef749630 [2021-11-23 03:37:45,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:37:45,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:37:45,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:37:45,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:37:45,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:37:45,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:45" (1/1) ... [2021-11-23 03:37:45,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bfca0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:45, skipping insertion in model container [2021-11-23 03:37:45,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:45" (1/1) ... [2021-11-23 03:37:45,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:37:45,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:37:46,060 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:46,065 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:37:46,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:46,099 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:37:46,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46 WrapperNode [2021-11-23 03:37:46,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:37:46,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:46,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:37:46,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:37:46,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,150 INFO L137 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2021-11-23 03:37:46,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:46,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:37:46,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:37:46,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:37:46,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:37:46,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:37:46,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:37:46,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:37:46,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (1/1) ... [2021-11-23 03:37:46,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:37:46,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:46,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:37:46,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:37:46,336 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2021-11-23 03:37:46,336 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2021-11-23 03:37:46,337 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2021-11-23 03:37:46,339 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2021-11-23 03:37:46,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:37:46,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:37:46,410 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:37:46,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:37:46,552 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:37:46,579 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:37:46,579 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:37:46,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:46 BoogieIcfgContainer [2021-11-23 03:37:46,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:37:46,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:37:46,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:37:46,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:37:46,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:37:45" (1/3) ... [2021-11-23 03:37:46,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a3a21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:46, skipping insertion in model container [2021-11-23 03:37:46,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:46" (2/3) ... [2021-11-23 03:37:46,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30a3a21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:46, skipping insertion in model container [2021-11-23 03:37:46,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:46" (3/3) ... [2021-11-23 03:37:46,593 INFO L111 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2021-11-23 03:37:46,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:37:46,600 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-23 03:37:46,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:37:46,669 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:37:46,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-23 03:37:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:37:46,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:37:46,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:46,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:46,702 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash 217860365, now seen corresponding path program 1 times [2021-11-23 03:37:46,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:46,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556264689] [2021-11-23 03:37:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:46,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:37:47,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:47,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556264689] [2021-11-23 03:37:47,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556264689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:47,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:47,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:37:47,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34456008] [2021-11-23 03:37:47,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:47,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:37:47,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:37:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:37:47,071 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:37:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:47,162 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-11-23 03:37:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:37:47,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-23 03:37:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:47,173 INFO L225 Difference]: With dead ends: 66 [2021-11-23 03:37:47,174 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:37:47,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:47,183 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:47,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:37:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:37:47,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-11-23 03:37:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:37:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-23 03:37:47,231 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2021-11-23 03:37:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:47,232 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-23 03:37:47,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:37:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-23 03:37:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:37:47,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:47,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:47,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:37:47,235 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1836263215, now seen corresponding path program 1 times [2021-11-23 03:37:47,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:47,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423912650] [2021-11-23 03:37:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:47,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:37:47,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:47,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423912650] [2021-11-23 03:37:47,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423912650] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:47,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:47,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:37:47,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992199396] [2021-11-23 03:37:47,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:47,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:37:47,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:37:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:37:47,329 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:37:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:47,424 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-11-23 03:37:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:37:47,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-23 03:37:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:47,426 INFO L225 Difference]: With dead ends: 38 [2021-11-23 03:37:47,426 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:37:47,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:47,429 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:47,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 97 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:37:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:37:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-11-23 03:37:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 03:37:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-23 03:37:47,442 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2021-11-23 03:37:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:47,443 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-23 03:37:47,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:37:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-23 03:37:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:37:47,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:47,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:47,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:37:47,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash -4402756, now seen corresponding path program 1 times [2021-11-23 03:37:47,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:47,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311200201] [2021-11-23 03:37:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:47,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:37:47,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311200201] [2021-11-23 03:37:47,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311200201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:47,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:47,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:37:47,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437717693] [2021-11-23 03:37:47,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:47,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:37:47,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:47,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:37:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:37:47,530 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:37:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:47,577 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-23 03:37:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:37:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2021-11-23 03:37:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:47,580 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:37:47,580 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 03:37:47,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:47,583 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:47,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:37:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 03:37:47,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-23 03:37:47,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:37:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-23 03:37:47,596 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 12 [2021-11-23 03:37:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:47,597 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-23 03:37:47,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:37:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-23 03:37:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:37:47,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:47,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:47,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:37:47,600 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:47,601 INFO L85 PathProgramCache]: Analyzing trace with hash -136485339, now seen corresponding path program 1 times [2021-11-23 03:37:47,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:47,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977132004] [2021-11-23 03:37:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:47,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:37:47,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977132004] [2021-11-23 03:37:47,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977132004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:47,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:47,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:37:47,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580641527] [2021-11-23 03:37:47,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:47,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:37:47,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:47,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:37:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:37:47,654 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:37:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:47,690 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-23 03:37:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:37:47,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-23 03:37:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:47,693 INFO L225 Difference]: With dead ends: 33 [2021-11-23 03:37:47,693 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:37:47,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:47,696 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:47,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:37:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:37:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 03:37:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:37:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-11-23 03:37:47,708 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2021-11-23 03:37:47,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:47,708 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-11-23 03:37:47,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:37:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-11-23 03:37:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:37:47,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:47,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:47,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:37:47,712 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1642845449, now seen corresponding path program 1 times [2021-11-23 03:37:47,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:47,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100332037] [2021-11-23 03:37:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:47,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:37:47,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:47,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100332037] [2021-11-23 03:37:47,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100332037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:47,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549352904] [2021-11-23 03:37:47,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:47,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:47,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:47,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:47,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:37:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:47,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:37:47,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:37:48,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:37:48,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549352904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:37:48,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [272415573] [2021-11-23 03:37:48,273 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:37:48,276 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:48,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:37:48,294 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:37:48,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:37:49,143 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-23 03:37:49,149 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-23 03:37:49,156 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:37:49,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '578#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-23 03:37:49,535 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:37:49,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:37:49,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-23 03:37:49,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668242599] [2021-11-23 03:37:49,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:49,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:37:49,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:37:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:37:49,538 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:37:49,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:49,716 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2021-11-23 03:37:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:37:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 24 [2021-11-23 03:37:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:49,725 INFO L225 Difference]: With dead ends: 58 [2021-11-23 03:37:49,726 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 03:37:49,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-11-23 03:37:49,734 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:49,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:37:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 03:37:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-11-23 03:37:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 42 states have internal predecessors, (51), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-23 03:37:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2021-11-23 03:37:49,763 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 24 [2021-11-23 03:37:49,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:49,764 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2021-11-23 03:37:49,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 03:37:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2021-11-23 03:37:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 03:37:49,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:49,769 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-11-23 03:37:49,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 03:37:49,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:49,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:49,979 INFO L85 PathProgramCache]: Analyzing trace with hash 744004080, now seen corresponding path program 2 times [2021-11-23 03:37:49,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:49,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244298652] [2021-11-23 03:37:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:49,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:37:50,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244298652] [2021-11-23 03:37:50,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244298652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782930986] [2021-11-23 03:37:50,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:37:50,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:50,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:50,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:50,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:37:50,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 03:37:50,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:37:50,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:37:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:37:50,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:37:50,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782930986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:37:50,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131123491] [2021-11-23 03:37:50,652 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:37:50,653 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:50,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:37:50,654 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:37:50,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:37:51,186 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-23 03:37:51,189 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-23 03:37:51,192 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:37:51,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-23 03:37:51,531 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:37:51,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:37:51,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-23 03:37:51,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653767100] [2021-11-23 03:37:51,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:51,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 03:37:51,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 03:37:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 03:37:51,534 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-23 03:37:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:51,889 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2021-11-23 03:37:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 03:37:51,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 60 [2021-11-23 03:37:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:51,896 INFO L225 Difference]: With dead ends: 106 [2021-11-23 03:37:51,896 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 03:37:51,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 03:37:51,899 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 135 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:51,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 215 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:37:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 03:37:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-23 03:37:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 78 states have internal predecessors, (93), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-23 03:37:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2021-11-23 03:37:51,925 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 60 [2021-11-23 03:37:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:51,936 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2021-11-23 03:37:51,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-23 03:37:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2021-11-23 03:37:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 03:37:51,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:51,959 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2021-11-23 03:37:52,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:52,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:37:52,160 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1646882110, now seen corresponding path program 3 times [2021-11-23 03:37:52,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:52,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561406104] [2021-11-23 03:37:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:52,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-23 03:37:52,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:52,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561406104] [2021-11-23 03:37:52,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561406104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:52,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757681348] [2021-11-23 03:37:52,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:37:52,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:52,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:52,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:52,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:37:52,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:37:52,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:37:52,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:37:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-23 03:37:53,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-23 03:37:53,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757681348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:37:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577315765] [2021-11-23 03:37:53,973 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:37:53,973 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:53,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:37:53,974 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:37:53,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:37:54,384 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-23 03:37:54,386 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-23 03:37:54,389 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:37:54,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2248#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-23 03:37:54,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:37:54,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:37:54,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-23 03:37:54,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468930510] [2021-11-23 03:37:54,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:54,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 03:37:54,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 03:37:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=2804, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 03:37:54,791 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2021-11-23 03:37:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:55,707 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2021-11-23 03:37:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 03:37:55,708 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) Word has length 132 [2021-11-23 03:37:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:55,711 INFO L225 Difference]: With dead ends: 202 [2021-11-23 03:37:55,712 INFO L226 Difference]: Without dead ends: 201 [2021-11-23 03:37:55,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1400, Invalid=5080, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 03:37:55,718 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 280 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:55,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 201 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:37:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-23 03:37:55,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-11-23 03:37:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 149 states have (on average 1.1879194630872483) internal successors, (177), 150 states have internal predecessors, (177), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 03:37:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 273 transitions. [2021-11-23 03:37:55,742 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 273 transitions. Word has length 132 [2021-11-23 03:37:55,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:55,743 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 273 transitions. [2021-11-23 03:37:55,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2021-11-23 03:37:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 273 transitions. [2021-11-23 03:37:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-23 03:37:55,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:55,749 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2021-11-23 03:37:55,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:55,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:37:55,970 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:37:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1313421786, now seen corresponding path program 4 times [2021-11-23 03:37:55,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:55,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793637482] [2021-11-23 03:37:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:55,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-23 03:37:57,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793637482] [2021-11-23 03:37:57,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793637482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274692997] [2021-11-23 03:37:57,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:37:57,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:57,125 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:57,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:37:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 03:37:57,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-23 03:37:57,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-23 03:38:00,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274692997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:00,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766375230] [2021-11-23 03:38:00,630 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:38:00,630 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:38:00,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:38:00,631 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:38:00,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:38:01,005 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-23 03:38:01,009 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-23 03:38:01,011 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:38:01,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-23 03:38:01,483 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:38:01,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:38:01,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-23 03:38:01,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869003832] [2021-11-23 03:38:01,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:38:01,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-23 03:38:01,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-23 03:38:01,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=8996, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 03:38:01,494 INFO L87 Difference]: Start difference. First operand 200 states and 273 transitions. Second operand has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2021-11-23 03:38:03,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:03,671 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2021-11-23 03:38:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-23 03:38:03,672 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) Word has length 276 [2021-11-23 03:38:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:03,677 INFO L225 Difference]: With dead ends: 394 [2021-11-23 03:38:03,678 INFO L226 Difference]: Without dead ends: 393 [2021-11-23 03:38:03,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6028 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5636, Invalid=17620, Unknown=0, NotChecked=0, Total=23256 [2021-11-23 03:38:03,688 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 583 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:03,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 934 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:38:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-23 03:38:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 392. [2021-11-23 03:38:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 293 states have (on average 1.1774744027303754) internal successors, (345), 294 states have internal predecessors, (345), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-23 03:38:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 537 transitions. [2021-11-23 03:38:03,721 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 537 transitions. Word has length 276 [2021-11-23 03:38:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:03,722 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 537 transitions. [2021-11-23 03:38:03,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2021-11-23 03:38:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 537 transitions. [2021-11-23 03:38:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-11-23 03:38:03,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:03,735 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2021-11-23 03:38:03,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:03,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:03,950 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:38:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 378104594, now seen corresponding path program 5 times [2021-11-23 03:38:03,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794700056] [2021-11-23 03:38:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:03,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-23 03:38:07,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794700056] [2021-11-23 03:38:07,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794700056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566464802] [2021-11-23 03:38:07,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:38:07,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:07,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:38:07,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:38:07,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:38:07,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-23 03:38:07,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:38:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-23 03:38:07,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-23 03:38:09,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:38:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-23 03:38:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566464802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:38:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1859821216] [2021-11-23 03:38:16,739 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:38:16,739 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:38:16,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:38:16,740 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:38:16,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:38:17,074 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-23 03:38:17,076 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-23 03:38:17,078 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:38:17,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9210#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-23 03:38:17,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:38:17,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:38:17,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-23 03:38:17,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856065010] [2021-11-23 03:38:17,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:38:17,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-23 03:38:17,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:17,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-23 03:38:17,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9258, Invalid=31748, Unknown=0, NotChecked=0, Total=41006 [2021-11-23 03:38:17,752 INFO L87 Difference]: Start difference. First operand 392 states and 537 transitions. Second operand has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2021-11-23 03:38:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:24,716 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2021-11-23 03:38:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-23 03:38:24,718 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) Word has length 564 [2021-11-23 03:38:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:24,725 INFO L225 Difference]: With dead ends: 778 [2021-11-23 03:38:24,726 INFO L226 Difference]: Without dead ends: 777 [2021-11-23 03:38:24,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1584 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21364 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=22748, Invalid=65164, Unknown=0, NotChecked=0, Total=87912 [2021-11-23 03:38:24,736 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 1398 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:24,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1400 Valid, 1913 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:38:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-11-23 03:38:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 776. [2021-11-23 03:38:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 581 states have (on average 1.1721170395869192) internal successors, (681), 582 states have internal predecessors, (681), 192 states have call successors, (192), 2 states have call predecessors, (192), 2 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2021-11-23 03:38:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1065 transitions. [2021-11-23 03:38:24,780 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1065 transitions. Word has length 564 [2021-11-23 03:38:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:24,783 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1065 transitions. [2021-11-23 03:38:24,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2021-11-23 03:38:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1065 transitions. [2021-11-23 03:38:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2021-11-23 03:38:24,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:24,836 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 94, 1, 1, 1] [2021-11-23 03:38:24,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:25,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:25,062 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:38:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:25,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1733045634, now seen corresponding path program 6 times [2021-11-23 03:38:25,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:25,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656458017] [2021-11-23 03:38:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:25,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-23 03:38:35,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656458017] [2021-11-23 03:38:35,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656458017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058436924] [2021-11-23 03:38:35,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:38:35,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:35,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:38:35,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:38:35,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:38:40,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:38:40,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:38:41,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-23 03:38:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-23 03:38:43,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:39:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-23 03:39:07,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058436924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:39:07,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714967635] [2021-11-23 03:39:07,959 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:39:07,959 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:39:07,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:39:07,959 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:39:07,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:39:08,315 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-23 03:39:08,317 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-23 03:39:08,319 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:39:09,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18571#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-23 03:39:09,405 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:39:09,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:39:09,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-23 03:39:09,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036043336] [2021-11-23 03:39:09,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:39:09,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-23 03:39:09,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-23 03:39:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36906, Invalid=118724, Unknown=0, NotChecked=0, Total=155630 [2021-11-23 03:39:09,437 INFO L87 Difference]: Start difference. First operand 776 states and 1065 transitions. Second operand has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2021-11-23 03:39:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:40,448 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2021-11-23 03:39:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-23 03:39:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) Word has length 1140 [2021-11-23 03:39:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:40,463 INFO L225 Difference]: With dead ends: 1546 [2021-11-23 03:39:40,463 INFO L226 Difference]: Without dead ends: 1545 [2021-11-23 03:39:40,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3799 GetRequests, 3216 SyntacticMatches, 0 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79684 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=91532, Invalid=250108, Unknown=0, NotChecked=0, Total=341640 [2021-11-23 03:39:40,491 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 3161 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 2821 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:40,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3163 Valid, 2821 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 03:39:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-11-23 03:39:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1544. [2021-11-23 03:39:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1157 states have (on average 1.1694036300777875) internal successors, (1353), 1158 states have internal predecessors, (1353), 384 states have call successors, (384), 2 states have call predecessors, (384), 2 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2021-11-23 03:39:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2121 transitions. [2021-11-23 03:39:40,558 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2121 transitions. Word has length 1140 [2021-11-23 03:39:40,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:40,562 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 2121 transitions. [2021-11-23 03:39:40,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2021-11-23 03:39:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2121 transitions. [2021-11-23 03:39:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2293 [2021-11-23 03:39:40,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:40,603 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 190, 1, 1, 1] [2021-11-23 03:39:40,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:39:40,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:39:40,803 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:39:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 198914658, now seen corresponding path program 7 times [2021-11-23 03:39:40,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028042107] [2021-11-23 03:39:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:40,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2021-11-23 03:40:18,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028042107] [2021-11-23 03:40:18,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028042107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457960963] [2021-11-23 03:40:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:40:18,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:18,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:18,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:18,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:40:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:19,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 4974 conjuncts, 383 conjunts are in the unsatisfiable core [2021-11-23 03:40:19,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2021-11-23 03:40:23,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:42:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2021-11-23 03:42:01,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457960963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:42:01,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485616857] [2021-11-23 03:42:01,050 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:42:01,050 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:42:01,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:42:01,050 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:42:01,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:42:01,352 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-23 03:42:01,354 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-23 03:42:01,356 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:42:03,469 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37340#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-23 03:42:03,469 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:42:03,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:42:03,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2021-11-23 03:42:03,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162959035] [2021-11-23 03:42:03,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:42:03,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2021-11-23 03:42:03,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2021-11-23 03:42:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147498, Invalid=458564, Unknown=0, NotChecked=0, Total=606062 [2021-11-23 03:42:03,566 INFO L87 Difference]: Start difference. First operand 1544 states and 2121 transitions. Second operand has 766 states, 765 states have (on average 2.9986928104575163) internal successors, (2294), 766 states have internal predecessors, (2294), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) [2021-11-23 03:47:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:04,976 INFO L93 Difference]: Finished difference Result 3082 states and 4426 transitions. [2021-11-23 03:47:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 767 states. [2021-11-23 03:47:04,980 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 2.9986928104575163) internal successors, (2294), 766 states have internal predecessors, (2294), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) Word has length 2292 [2021-11-23 03:47:04,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:05,008 INFO L225 Difference]: With dead ends: 3082 [2021-11-23 03:47:05,009 INFO L226 Difference]: Without dead ends: 3081 [2021-11-23 03:47:05,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7639 GetRequests, 6480 SyntacticMatches, 0 SemanticMatches, 1159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306916 ImplicationChecksByTransitivity, 199.8s TimeCoverageRelationStatistics Valid=367340, Invalid=979420, Unknown=0, NotChecked=0, Total=1346760 [2021-11-23 03:47:05,121 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 5975 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 7479 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5977 SdHoareTripleChecker+Valid, 3970 SdHoareTripleChecker+Invalid, 7680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 7479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:05,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5977 Valid, 3970 Invalid, 7680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [201 Valid, 7479 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 03:47:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-11-23 03:47:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 3080. [2021-11-23 03:47:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 2309 states have (on average 1.1680381117366825) internal successors, (2697), 2310 states have internal predecessors, (2697), 768 states have call successors, (768), 2 states have call predecessors, (768), 2 states have return successors, (768), 768 states have call predecessors, (768), 768 states have call successors, (768) [2021-11-23 03:47:05,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4233 transitions. [2021-11-23 03:47:05,268 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4233 transitions. Word has length 2292 [2021-11-23 03:47:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:05,278 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 4233 transitions. [2021-11-23 03:47:05,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 2.9986928104575163) internal successors, (2294), 766 states have internal predecessors, (2294), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) [2021-11-23 03:47:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4233 transitions. [2021-11-23 03:47:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4597 [2021-11-23 03:47:05,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:05,429 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 383, 383, 383, 383, 383, 383, 383, 382, 382, 382, 1, 1, 1] [2021-11-23 03:47:05,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:47:05,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d59424-f53d-439c-9607-67e1c00a4bf8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:47:05,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-23 03:47:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1897872418, now seen corresponding path program 8 times [2021-11-23 03:47:05,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:05,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707965545] [2021-11-23 03:47:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:05,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat