./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/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_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:27:27,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:27,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:27,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:27,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:27,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:27,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:27,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:27,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:27,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:27,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:27,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:27,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:27,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:27,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:27,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:27,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:27,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:27,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:27,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:27,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:27,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:27,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:27,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:27,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:27,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:27,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:27,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:27,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:27,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:27,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:27,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:27,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:27,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:27,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:27,523 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:27,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:27,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:27,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:27,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:27,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:27,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-03 02:27:27,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:27,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:27,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:27,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:27,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:27,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:27,578 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:27,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:27,578 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:27,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:27:27,580 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:27,580 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:27,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:27:27,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:27:27,581 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:27,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:27:27,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:27:27,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:27:27,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:27,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:27:27,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:27:27,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:27,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:27,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:27,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:27,585 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-03 02:27:27,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:27,586 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:27,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:27,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:27,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:27,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:27,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:27,587 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:27:27,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:27,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:27,588 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:27:27,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:27:27,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:27,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:27,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2022-11-03 02:27:27,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:27,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:27,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:27,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:27,941 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:27,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-03 02:27:28,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/data/34add433e/56f12de8227e41efb300d83a452f1c95/FLAGa5cf028ee [2022-11-03 02:27:28,680 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:28,681 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-03 02:27:28,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/data/34add433e/56f12de8227e41efb300d83a452f1c95/FLAGa5cf028ee [2022-11-03 02:27:29,027 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/data/34add433e/56f12de8227e41efb300d83a452f1c95 [2022-11-03 02:27:29,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:29,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:29,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:29,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:29,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:29,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170dc9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29, skipping insertion in model container [2022-11-03 02:27:29,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:29,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:27:29,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:29,339 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:27:29,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:29,371 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:27:29,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29 WrapperNode [2022-11-03 02:27:29,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:29,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:29,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:27:29,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:27:29,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,412 INFO L138 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-03 02:27:29,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:29,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:27:29,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:27:29,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:27:29,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,455 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:27:29,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:27:29,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:27:29,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:27:29,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (1/1) ... [2022-11-03 02:27:29,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:29,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:29,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:27:29,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:27:29,572 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2022-11-03 02:27:29,572 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2022-11-03 02:27:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2022-11-03 02:27:29,573 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2022-11-03 02:27:29,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:27:29,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:27:29,646 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:27:29,648 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:27:29,891 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:29,951 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:29,951 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:27:29,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:29 BoogieIcfgContainer [2022-11-03 02:27:29,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:29,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:29,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:29,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:29,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:29" (1/3) ... [2022-11-03 02:27:29,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248fb6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:29, skipping insertion in model container [2022-11-03 02:27:29,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:29" (2/3) ... [2022-11-03 02:27:29,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248fb6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:29, skipping insertion in model container [2022-11-03 02:27:29,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:29" (3/3) ... [2022-11-03 02:27:29,981 INFO L112 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-03 02:27:30,009 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:30,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-03 02:27:30,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:30,110 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@13b832eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:30,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-03 02:27:30,116 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) [2022-11-03 02:27:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:27:30,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:30,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:30,143 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:30,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash 217860365, now seen corresponding path program 1 times [2022-11-03 02:27:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:30,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600392031] [2022-11-03 02:27:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:30,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:30,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600392031] [2022-11-03 02:27:30,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600392031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:30,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:30,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26639314] [2022-11-03 02:27:30,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:30,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:30,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:30,546 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) [2022-11-03 02:27:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:30,663 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-11-03 02:27:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:30,667 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 [2022-11-03 02:27:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:30,675 INFO L225 Difference]: With dead ends: 66 [2022-11-03 02:27:30,681 INFO L226 Difference]: Without dead ends: 42 [2022-11-03 02:27:30,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:30,691 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:30,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:30,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-03 02:27:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2022-11-03 02:27:30,737 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) [2022-11-03 02:27:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-03 02:27:30,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2022-11-03 02:27:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:30,740 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-03 02:27:30,740 INFO L496 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) [2022-11-03 02:27:30,741 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-03 02:27:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:27:30,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:30,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:30,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:27:30,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1836263215, now seen corresponding path program 1 times [2022-11-03 02:27:30,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:30,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585410642] [2022-11-03 02:27:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:30,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:30,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585410642] [2022-11-03 02:27:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585410642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:30,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:30,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437006153] [2022-11-03 02:27:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:30,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:30,845 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) [2022-11-03 02:27:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:30,881 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-03 02:27:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:30,882 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 [2022-11-03 02:27:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:30,883 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:27:30,883 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 02:27:30,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:30,885 INFO L413 NwaCegarLoop]: 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 [2022-11-03 02:27:30,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 97 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:27:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 02:27:30,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-11-03 02:27:30,892 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) [2022-11-03 02:27:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-03 02:27:30,894 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2022-11-03 02:27:30,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:30,894 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-03 02:27:30,895 INFO L496 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) [2022-11-03 02:27:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-03 02:27:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:27:30,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:30,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:30,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:27:30,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash -4402756, now seen corresponding path program 1 times [2022-11-03 02:27:30,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:30,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450075880] [2022-11-03 02:27:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:30,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450075880] [2022-11-03 02:27:30,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450075880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:30,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:30,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:30,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468534178] [2022-11-03 02:27:30,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:30,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:30,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:30,986 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) [2022-11-03 02:27:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:31,066 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-03 02:27:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:31,067 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 [2022-11-03 02:27:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:31,067 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:27:31,068 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 02:27:31,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:31,069 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:31,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 02:27:31,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-03 02:27:31,076 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) [2022-11-03 02:27:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-03 02:27:31,078 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 12 [2022-11-03 02:27:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:31,078 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-03 02:27:31,079 INFO L496 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) [2022-11-03 02:27:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-03 02:27:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:27:31,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:31,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:31,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:27:31,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash -136485339, now seen corresponding path program 1 times [2022-11-03 02:27:31,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:31,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705990839] [2022-11-03 02:27:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:31,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:27:31,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:31,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705990839] [2022-11-03 02:27:31,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705990839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:31,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:31,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826157913] [2022-11-03 02:27:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:31,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:31,204 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) [2022-11-03 02:27:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:31,262 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-03 02:27:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:31,262 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 [2022-11-03 02:27:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:31,263 INFO L225 Difference]: With dead ends: 33 [2022-11-03 02:27:31,263 INFO L226 Difference]: Without dead ends: 32 [2022-11-03 02:27:31,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:31,265 INFO L413 NwaCegarLoop]: 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 [2022-11-03 02:27:31,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:27:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-03 02:27:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-03 02:27:31,273 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) [2022-11-03 02:27:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-03 02:27:31,274 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2022-11-03 02:27:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:31,275 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-03 02:27:31,275 INFO L496 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) [2022-11-03 02:27:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-03 02:27:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:27:31,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:31,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:31,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:27:31,277 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1642845449, now seen corresponding path program 1 times [2022-11-03 02:27:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:31,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811715497] [2022-11-03 02:27:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:27:31,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811715497] [2022-11-03 02:27:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811715497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236288381] [2022-11-03 02:27:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:31,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:31,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:31,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:31,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:27:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:27:31,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:27:31,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:27:31,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236288381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:31,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742683035] [2022-11-03 02:27:31,796 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:27:31,796 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:31,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:31,807 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:31,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:32,721 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-03 02:27:32,728 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-03 02:27:32,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:33,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '578#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-03 02:27:33,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:33,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:27:33,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-03 02:27:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445852276] [2022-11-03 02:27:33,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:33,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:27:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:27:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:27:33,220 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) [2022-11-03 02:27:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:33,388 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2022-11-03 02:27:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:27:33,389 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 [2022-11-03 02:27:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:33,398 INFO L225 Difference]: With dead ends: 58 [2022-11-03 02:27:33,398 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 02:27:33,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:27:33,405 INFO L413 NwaCegarLoop]: 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 [2022-11-03 02:27:33,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 02:27:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-03 02:27:33,425 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) [2022-11-03 02:27:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2022-11-03 02:27:33,427 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 24 [2022-11-03 02:27:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:33,428 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2022-11-03 02:27:33,428 INFO L496 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) [2022-11-03 02:27:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2022-11-03 02:27:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:27:33,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:33,431 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-03 02:27:33,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:33,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:33,646 INFO L85 PathProgramCache]: Analyzing trace with hash 744004080, now seen corresponding path program 2 times [2022-11-03 02:27:33,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:33,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271862117] [2022-11-03 02:27:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:27:34,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:34,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271862117] [2022-11-03 02:27:34,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271862117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:34,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097886242] [2022-11-03 02:27:34,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:27:34,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:34,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:34,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:27:34,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 02:27:34,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:27:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:27:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:27:34,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:27:34,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097886242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:34,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [96543931] [2022-11-03 02:27:34,584 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:27:34,585 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:34,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:34,586 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:34,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:35,015 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-03 02:27:35,019 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-03 02:27:35,021 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:35,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-03 02:27:35,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:35,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:27:35,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-03 02:27:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932413143] [2022-11-03 02:27:35,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:35,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:27:35,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:35,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:27:35,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:27:35,453 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) [2022-11-03 02:27:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:35,866 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2022-11-03 02:27:35,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:27:35,867 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 [2022-11-03 02:27:35,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:35,869 INFO L225 Difference]: With dead ends: 106 [2022-11-03 02:27:35,869 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:27:35,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 02:27:35,871 INFO L413 NwaCegarLoop]: 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:35,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 215 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:27:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:27:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-11-03 02:27:35,885 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) [2022-11-03 02:27:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2022-11-03 02:27:35,888 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 60 [2022-11-03 02:27:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:35,888 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2022-11-03 02:27:35,889 INFO L496 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) [2022-11-03 02:27:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2022-11-03 02:27:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:27:35,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:35,893 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2022-11-03 02:27:35,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:36,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:27:36,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1646882110, now seen corresponding path program 3 times [2022-11-03 02:27:36,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486566260] [2022-11-03 02:27:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-03 02:27:37,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486566260] [2022-11-03 02:27:37,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486566260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546367844] [2022-11-03 02:27:37,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:27:37,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:37,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:37,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:27:37,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:27:37,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:27:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:27:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-03 02:27:37,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-03 02:27:38,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546367844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:38,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002123333] [2022-11-03 02:27:38,462 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:27:38,462 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:38,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:38,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:38,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:38,843 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-03 02:27:38,845 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-03 02:27:38,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:39,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2248#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-03 02:27:39,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:39,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:27:39,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-03 02:27:39,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963880526] [2022-11-03 02:27:39,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:39,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 02:27:39,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:39,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 02:27:39,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=2804, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:27:39,408 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) [2022-11-03 02:27:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:40,530 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2022-11-03 02:27:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-03 02:27:40,531 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 [2022-11-03 02:27:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:40,533 INFO L225 Difference]: With dead ends: 202 [2022-11-03 02:27:40,533 INFO L226 Difference]: Without dead ends: 201 [2022-11-03 02:27:40,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1400, Invalid=5080, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 02:27:40,537 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 280 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:40,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 201 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:27:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-03 02:27:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-11-03 02:27:40,582 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) [2022-11-03 02:27:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 273 transitions. [2022-11-03 02:27:40,585 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 273 transitions. Word has length 132 [2022-11-03 02:27:40,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:40,586 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 273 transitions. [2022-11-03 02:27:40,587 INFO L496 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) [2022-11-03 02:27:40,587 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 273 transitions. [2022-11-03 02:27:40,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-03 02:27:40,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:40,600 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2022-11-03 02:27:40,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:40,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:40,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1313421786, now seen corresponding path program 4 times [2022-11-03 02:27:40,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:40,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792562691] [2022-11-03 02:27:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:40,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-03 02:27:43,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:43,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792562691] [2022-11-03 02:27:43,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792562691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:43,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881443509] [2022-11-03 02:27:43,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:27:43,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:43,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:43,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:43,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:27:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:43,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-03 02:27:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-03 02:27:44,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-03 02:27:47,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881443509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155740004] [2022-11-03 02:27:47,056 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:27:47,056 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:47,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:47,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:47,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:47,308 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-03 02:27:47,311 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-03 02:27:47,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:48,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-03 02:27:48,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:48,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:27:48,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-03 02:27:48,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055894322] [2022-11-03 02:27:48,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:48,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-03 02:27:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:48,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-03 02:27:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=8996, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:27:48,064 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) [2022-11-03 02:27:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:51,164 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2022-11-03 02:27:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-03 02:27:51,165 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 [2022-11-03 02:27:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:51,169 INFO L225 Difference]: With dead ends: 394 [2022-11-03 02:27:51,169 INFO L226 Difference]: Without dead ends: 393 [2022-11-03 02:27:51,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6028 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5636, Invalid=17620, Unknown=0, NotChecked=0, Total=23256 [2022-11-03 02:27:51,179 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 583 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:51,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 934 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:27:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-03 02:27:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 392. [2022-11-03 02:27:51,232 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) [2022-11-03 02:27:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 537 transitions. [2022-11-03 02:27:51,241 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 537 transitions. Word has length 276 [2022-11-03 02:27:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:51,243 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 537 transitions. [2022-11-03 02:27:51,244 INFO L496 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) [2022-11-03 02:27:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 537 transitions. [2022-11-03 02:27:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-11-03 02:27:51,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:51,267 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2022-11-03 02:27:51,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:51,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:51,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:27:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash 378104594, now seen corresponding path program 5 times [2022-11-03 02:27:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:51,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945022627] [2022-11-03 02:27:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:51,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-03 02:28:00,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:00,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945022627] [2022-11-03 02:28:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945022627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:00,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741034462] [2022-11-03 02:28:00,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:28:00,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:00,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:00,637 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:00,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:28:01,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-03 02:28:01,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:28:01,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-03 02:28:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-03 02:28:01,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-03 02:28:11,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741034462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:11,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410006117] [2022-11-03 02:28:11,375 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:28:11,376 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:11,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:11,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:11,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:11,635 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-03 02:28:11,637 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-03 02:28:11,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:12,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9210#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-03 02:28:12,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:28:12,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:28:12,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-03 02:28:12,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955561288] [2022-11-03 02:28:12,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-03 02:28:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:12,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-03 02:28:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9258, Invalid=31748, Unknown=0, NotChecked=0, Total=41006 [2022-11-03 02:28:12,511 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) [2022-11-03 02:28:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:21,602 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2022-11-03 02:28:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-03 02:28:21,604 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 [2022-11-03 02:28:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:21,610 INFO L225 Difference]: With dead ends: 778 [2022-11-03 02:28:21,610 INFO L226 Difference]: Without dead ends: 777 [2022-11-03 02:28:21,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1584 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21364 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=22748, Invalid=65164, Unknown=0, NotChecked=0, Total=87912 [2022-11-03 02:28:21,623 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1398 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:21,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 1913 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:28:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-03 02:28:21,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 776. [2022-11-03 02:28:21,656 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) [2022-11-03 02:28:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1065 transitions. [2022-11-03 02:28:21,662 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1065 transitions. Word has length 564 [2022-11-03 02:28:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:21,663 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1065 transitions. [2022-11-03 02:28:21,664 INFO L496 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) [2022-11-03 02:28:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1065 transitions. [2022-11-03 02:28:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2022-11-03 02:28:21,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:21,722 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 94, 1, 1, 1] [2022-11-03 02:28:21,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:21,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:21,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:28:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1733045634, now seen corresponding path program 6 times [2022-11-03 02:28:21,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:21,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772031170] [2022-11-03 02:28:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-03 02:28:53,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:53,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772031170] [2022-11-03 02:28:53,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772031170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:53,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163848581] [2022-11-03 02:28:53,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:28:53,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:53,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:53,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:29:00,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:29:00,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:29:00,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 191 conjunts are in the unsatisfiable core [2022-11-03 02:29:00,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-03 02:29:02,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-03 02:29:35,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163848581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366207422] [2022-11-03 02:29:35,353 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:29:35,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:35,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:35,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:35,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:35,623 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-03 02:29:35,627 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-03 02:29:35,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:37,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18571#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-03 02:29:37,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:37,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:29:37,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-03 02:29:37,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210443420] [2022-11-03 02:29:37,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:37,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-03 02:29:37,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-03 02:29:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36906, Invalid=118724, Unknown=0, NotChecked=0, Total=155630 [2022-11-03 02:29:37,338 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) [2022-11-03 02:30:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:20,393 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2022-11-03 02:30:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2022-11-03 02:30:20,395 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 [2022-11-03 02:30:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:20,405 INFO L225 Difference]: With dead ends: 1546 [2022-11-03 02:30:20,406 INFO L226 Difference]: Without dead ends: 1545 [2022-11-03 02:30:20,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3799 GetRequests, 3216 SyntacticMatches, 0 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79684 ImplicationChecksByTransitivity, 66.8s TimeCoverageRelationStatistics Valid=91532, Invalid=250108, Unknown=0, NotChecked=0, Total=341640 [2022-11-03 02:30:20,432 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 3161 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:20,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3163 Valid, 2821 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:30:20,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-03 02:30:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1544. [2022-11-03 02:30:20,491 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) [2022-11-03 02:30:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2121 transitions. [2022-11-03 02:30:20,500 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2121 transitions. Word has length 1140 [2022-11-03 02:30:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:20,503 INFO L495 AbstractCegarLoop]: Abstraction has 1544 states and 2121 transitions. [2022-11-03 02:30:20,505 INFO L496 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) [2022-11-03 02:30:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2121 transitions. [2022-11-03 02:30:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2293 [2022-11-03 02:30:20,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:20,551 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 190, 1, 1, 1] [2022-11-03 02:30:20,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:20,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:30:20,752 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-03 02:30:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 198914658, now seen corresponding path program 7 times [2022-11-03 02:30:20,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:20,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209368798] [2022-11-03 02:30:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:20,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-03 02:33:28,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:33:28,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209368798] [2022-11-03 02:33:28,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209368798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:33:28,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387614849] [2022-11-03 02:33:28,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:33:28,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:28,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:28,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:28,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbf99f7-7a19-43af-bfac-954d11c7c5bb/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:33:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 4974 conjuncts, 383 conjunts are in the unsatisfiable core [2022-11-03 02:33:29,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-03 02:33:32,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:35:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-03 02:35:31,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387614849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:35:31,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316812707] [2022-11-03 02:35:31,996 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 02:35:31,997 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:35:31,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:35:31,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:35:31,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:35:32,194 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-03 02:35:32,196 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-03 02:35:32,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:35:34,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37340#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-03 02:35:34,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:35:34,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:35:34,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2022-11-03 02:35:34,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076668174] [2022-11-03 02:35:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2022-11-03 02:35:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2022-11-03 02:35:34,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147498, Invalid=458564, Unknown=0, NotChecked=0, Total=606062 [2022-11-03 02:35:34,918 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)