./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/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_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:22:34,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:22:34,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:22:34,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:22:34,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:22:34,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:22:34,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:22:34,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:22:34,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:22:34,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:22:34,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:22:34,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:22:34,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:22:34,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:22:34,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:22:34,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:22:34,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:22:34,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:22:34,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:22:34,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:22:34,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:22:34,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:22:34,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:22:34,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:22:34,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:22:34,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:22:34,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:22:34,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:22:34,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:22:34,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:22:34,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:22:34,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:22:34,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:22:34,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:22:34,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:22:34,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:22:34,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:22:34,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:22:34,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:22:34,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:22:34,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:22:34,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-25 18:22:34,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:22:34,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:22:34,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:22:34,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:22:34,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:22:34,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:22:34,389 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:22:34,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:22:34,390 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:22:34,390 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:22:34,390 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:22:34,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:22:34,391 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:22:34,391 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:22:34,391 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:22:34,392 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:22:34,392 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:22:34,392 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:22:34,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:22:34,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:22:34,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:22:34,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:22:34,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:22:34,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:22:34,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:22:34,395 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-25 18:22:34,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:22:34,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:22:34,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:22:34,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:22:34,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:22:34,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:22:34,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:22:34,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:22:34,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:22:34,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:22:34,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:22:34,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:22:34,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:22:34,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:22:34,398 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2021-11-25 18:22:34,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:22:34,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:22:34,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:22:34,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:22:34,684 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:22:34,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2021-11-25 18:22:34,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/data/afa9ab2f2/033d0ce3271d42c890ca234667e86e98/FLAGbf2e94dcb [2021-11-25 18:22:35,241 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:22:35,242 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2021-11-25 18:22:35,253 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/data/afa9ab2f2/033d0ce3271d42c890ca234667e86e98/FLAGbf2e94dcb [2021-11-25 18:22:35,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/data/afa9ab2f2/033d0ce3271d42c890ca234667e86e98 [2021-11-25 18:22:35,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:22:35,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:22:35,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:22:35,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:22:35,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:22:35,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f3316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35, skipping insertion in model container [2021-11-25 18:22:35,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:22:35,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:22:35,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:22:35,904 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:22:35,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:22:35,937 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:22:35,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35 WrapperNode [2021-11-25 18:22:35,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:22:35,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:22:35,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:22:35,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:22:35,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,972 INFO L137 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2021-11-25 18:22:35,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:22:35,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:22:35,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:22:35,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:22:35,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:35,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:36,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:36,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:36,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:22:36,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:22:36,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:22:36,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:22:36,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (1/1) ... [2021-11-25 18:22:36,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:22:36,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:36,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:22:36,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:22:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2021-11-25 18:22:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2021-11-25 18:22:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2021-11-25 18:22:36,111 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2021-11-25 18:22:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:22:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:22:36,177 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:22:36,179 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:22:36,351 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:22:36,377 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:22:36,377 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:22:36,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:36 BoogieIcfgContainer [2021-11-25 18:22:36,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:22:36,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:22:36,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:22:36,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:22:36,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:22:35" (1/3) ... [2021-11-25 18:22:36,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb6c0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:36, skipping insertion in model container [2021-11-25 18:22:36,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:22:35" (2/3) ... [2021-11-25 18:22:36,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb6c0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:22:36, skipping insertion in model container [2021-11-25 18:22:36,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:22:36" (3/3) ... [2021-11-25 18:22:36,391 INFO L111 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2021-11-25 18:22:36,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:22:36,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-25 18:22:36,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:22:36,480 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:22:36,490 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-25 18:22:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:22:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:22:36,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:36,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:36,542 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 217860365, now seen corresponding path program 1 times [2021-11-25 18:22:36,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:36,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139901836] [2021-11-25 18:22:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:36,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:36,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:36,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139901836] [2021-11-25 18:22:36,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139901836] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:36,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:36,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:22:36,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123622148] [2021-11-25 18:22:36,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:36,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:36,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:36,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:36,901 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:22:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:37,012 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-11-25 18:22:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:22:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-25 18:22:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:37,025 INFO L225 Difference]: With dead ends: 66 [2021-11-25 18:22:37,025 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 18:22:37,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:37,044 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:37,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 18:22:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2021-11-25 18:22:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:22:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-25 18:22:37,146 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2021-11-25 18:22:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:37,148 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-25 18:22:37,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:22:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-25 18:22:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:22:37,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:37,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:37,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:22:37,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:37,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1836263215, now seen corresponding path program 1 times [2021-11-25 18:22:37,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:37,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954353975] [2021-11-25 18:22:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:37,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:37,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:37,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954353975] [2021-11-25 18:22:37,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954353975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:37,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:37,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:22:37,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013768066] [2021-11-25 18:22:37,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:37,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:37,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:37,233 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:22:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:37,268 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-11-25 18:22:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:22:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-25 18:22:37,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:37,271 INFO L225 Difference]: With dead ends: 38 [2021-11-25 18:22:37,271 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 18:22:37,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:37,274 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:37,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 97 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 18:22:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2021-11-25 18:22:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:22:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-11-25 18:22:37,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2021-11-25 18:22:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:37,295 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-11-25 18:22:37,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:22:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-11-25 18:22:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:22:37,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:37,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:37,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:22:37,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash -4402756, now seen corresponding path program 1 times [2021-11-25 18:22:37,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:37,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045256824] [2021-11-25 18:22:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:37,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:37,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:37,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045256824] [2021-11-25 18:22:37,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045256824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:37,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:37,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:22:37,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809415602] [2021-11-25 18:22:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:37,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:37,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:37,395 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:22:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:37,478 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-25 18:22:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:22:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2021-11-25 18:22:37,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:37,481 INFO L225 Difference]: With dead ends: 36 [2021-11-25 18:22:37,481 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 18:22:37,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:37,483 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:37,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 18:22:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-11-25 18:22:37,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:22:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-25 18:22:37,496 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 12 [2021-11-25 18:22:37,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:37,497 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-25 18:22:37,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:22:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-25 18:22:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:22:37,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:37,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:37,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:22:37,501 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:37,506 INFO L85 PathProgramCache]: Analyzing trace with hash -136485339, now seen corresponding path program 1 times [2021-11-25 18:22:37,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:37,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098092560] [2021-11-25 18:22:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:37,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:22:37,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098092560] [2021-11-25 18:22:37,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098092560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:22:37,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:22:37,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:22:37,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101545487] [2021-11-25 18:22:37,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:22:37,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:22:37,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:37,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:22:37,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:22:37,589 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:22:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:37,621 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-25 18:22:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:22:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-25 18:22:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:37,623 INFO L225 Difference]: With dead ends: 33 [2021-11-25 18:22:37,623 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 18:22:37,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:22:37,625 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:37,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:22:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 18:22:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-25 18:22:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:22:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-11-25 18:22:37,636 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2021-11-25 18:22:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:37,637 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-11-25 18:22:37,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:22:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-11-25 18:22:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:22:37,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:37,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 18:22:37,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:22:37,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1642845449, now seen corresponding path program 1 times [2021-11-25 18:22:37,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:37,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369527416] [2021-11-25 18:22:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:37,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:22:37,731 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:37,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369527416] [2021-11-25 18:22:37,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369527416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:37,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923703127] [2021-11-25 18:22:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:37,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:37,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:37,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:37,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:22:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:37,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:22:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:22:37,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:38,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:22:38,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923703127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:38,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026798410] [2021-11-25 18:22:38,106 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:22:38,106 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:38,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:38,115 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:38,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:39,043 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-25 18:22:39,051 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-25 18:22:39,054 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:39,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '578#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-25 18:22:39,399 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:39,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:39,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-25 18:22:39,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322997880] [2021-11-25 18:22:39,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:39,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:22:39,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:22:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:22:39,402 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:22:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:39,563 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2021-11-25 18:22:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:22:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 24 [2021-11-25 18:22:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:39,569 INFO L225 Difference]: With dead ends: 58 [2021-11-25 18:22:39,569 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 18:22:39,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:22:39,574 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:39,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:22:39,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 18:22:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-11-25 18:22:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 42 states have internal predecessors, (51), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 18:22:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2021-11-25 18:22:39,603 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 24 [2021-11-25 18:22:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:39,604 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2021-11-25 18:22:39,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-25 18:22:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2021-11-25 18:22:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 18:22:39,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:39,608 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2021-11-25 18:22:39,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:39,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:39,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash 744004080, now seen corresponding path program 2 times [2021-11-25 18:22:39,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:39,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37404253] [2021-11-25 18:22:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:39,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:22:40,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37404253] [2021-11-25 18:22:40,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37404253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:40,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357659535] [2021-11-25 18:22:40,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:40,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:40,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:40,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:22:40,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:22:40,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:40,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:22:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:22:40,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:22:40,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357659535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331204229] [2021-11-25 18:22:40,531 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:22:40,532 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:40,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:40,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:40,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:41,054 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-25 18:22:41,057 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-25 18:22:41,060 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:41,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-25 18:22:41,376 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:41,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:41,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-25 18:22:41,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278113546] [2021-11-25 18:22:41,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:41,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 18:22:41,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:41,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 18:22:41,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:22:41,379 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-25 18:22:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:41,713 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2021-11-25 18:22:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:22:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 60 [2021-11-25 18:22:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:41,716 INFO L225 Difference]: With dead ends: 106 [2021-11-25 18:22:41,716 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 18:22:41,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 18:22:41,718 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 135 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:41,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 215 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:22:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 18:22:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-25 18:22:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 78 states have internal predecessors, (93), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-25 18:22:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2021-11-25 18:22:41,732 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 60 [2021-11-25 18:22:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:41,733 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2021-11-25 18:22:41,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-25 18:22:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2021-11-25 18:22:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-25 18:22:41,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:41,740 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2021-11-25 18:22:41,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:41,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:22:41,961 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1646882110, now seen corresponding path program 3 times [2021-11-25 18:22:41,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:41,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889083934] [2021-11-25 18:22:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:41,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-25 18:22:42,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889083934] [2021-11-25 18:22:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889083934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:42,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671376026] [2021-11-25 18:22:42,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:22:42,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:42,381 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:42,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:22:42,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:22:42,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:42,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:22:42,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-25 18:22:42,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-25 18:22:43,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671376026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:43,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537835794] [2021-11-25 18:22:43,579 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:22:43,579 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:43,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:43,580 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:43,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:43,953 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-25 18:22:43,956 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-25 18:22:43,958 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:44,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2248#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-25 18:22:44,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:44,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:44,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2021-11-25 18:22:44,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565674871] [2021-11-25 18:22:44,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:44,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-25 18:22:44,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-25 18:22:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=2804, Unknown=0, NotChecked=0, Total=3422 [2021-11-25 18:22:44,351 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2021-11-25 18:22:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:45,165 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2021-11-25 18:22:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-25 18:22:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) Word has length 132 [2021-11-25 18:22:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:45,169 INFO L225 Difference]: With dead ends: 202 [2021-11-25 18:22:45,169 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 18:22:45,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1400, Invalid=5080, Unknown=0, NotChecked=0, Total=6480 [2021-11-25 18:22:45,174 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 280 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:45,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 201 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:22:45,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 18:22:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2021-11-25 18:22:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 149 states have (on average 1.1879194630872483) internal successors, (177), 150 states have internal predecessors, (177), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-25 18:22:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 273 transitions. [2021-11-25 18:22:45,205 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 273 transitions. Word has length 132 [2021-11-25 18:22:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:45,209 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 273 transitions. [2021-11-25 18:22:45,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2021-11-25 18:22:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 273 transitions. [2021-11-25 18:22:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-25 18:22:45,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:45,226 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2021-11-25 18:22:45,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 18:22:45,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:45,449 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1313421786, now seen corresponding path program 4 times [2021-11-25 18:22:45,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:45,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383651750] [2021-11-25 18:22:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:45,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-25 18:22:46,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383651750] [2021-11-25 18:22:46,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383651750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88076407] [2021-11-25 18:22:46,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:22:46,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:46,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:46,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:46,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:22:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-25 18:22:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-25 18:22:47,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:22:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2021-11-25 18:22:49,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88076407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:22:49,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419010474] [2021-11-25 18:22:49,936 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:22:49,936 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:22:49,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:22:49,936 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:22:49,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:22:50,323 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-25 18:22:50,326 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-25 18:22:50,328 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:22:50,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-25 18:22:50,775 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:22:50,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:22:50,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2021-11-25 18:22:50,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121771454] [2021-11-25 18:22:50,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:22:50,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-25 18:22:50,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:22:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-25 18:22:50,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=8996, Unknown=0, NotChecked=0, Total=11342 [2021-11-25 18:22:50,787 INFO L87 Difference]: Start difference. First operand 200 states and 273 transitions. Second operand has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2021-11-25 18:22:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:22:53,049 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2021-11-25 18:22:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-25 18:22:53,050 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) Word has length 276 [2021-11-25 18:22:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:22:53,055 INFO L225 Difference]: With dead ends: 394 [2021-11-25 18:22:53,055 INFO L226 Difference]: Without dead ends: 393 [2021-11-25 18:22:53,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6028 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5636, Invalid=17620, Unknown=0, NotChecked=0, Total=23256 [2021-11-25 18:22:53,092 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 583 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:22:53,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 934 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:22:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-25 18:22:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 392. [2021-11-25 18:22:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 293 states have (on average 1.1774744027303754) internal successors, (345), 294 states have internal predecessors, (345), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-11-25 18:22:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 537 transitions. [2021-11-25 18:22:53,121 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 537 transitions. Word has length 276 [2021-11-25 18:22:53,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:22:53,122 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 537 transitions. [2021-11-25 18:22:53,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2021-11-25 18:22:53,123 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 537 transitions. [2021-11-25 18:22:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2021-11-25 18:22:53,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:22:53,137 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2021-11-25 18:22:53,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:22:53,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:53,360 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:22:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:22:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash 378104594, now seen corresponding path program 5 times [2021-11-25 18:22:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:22:53,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435532035] [2021-11-25 18:22:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:22:53,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:22:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:22:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-25 18:22:56,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:22:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435532035] [2021-11-25 18:22:56,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435532035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:22:56,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064340948] [2021-11-25 18:22:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:22:56,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:22:56,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:22:56,450 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:22:56,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:22:56,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-25 18:22:56,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:22:56,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-25 18:22:57,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:22:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-25 18:22:58,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2021-11-25 18:23:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064340948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:05,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113091497] [2021-11-25 18:23:05,553 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:23:05,553 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:05,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:23:05,554 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:23:05,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:23:05,869 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-25 18:23:05,872 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-25 18:23:05,874 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:23:06,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9210#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-25 18:23:06,540 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:23:06,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:06,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2021-11-25 18:23:06,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090569442] [2021-11-25 18:23:06,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:06,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-25 18:23:06,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-25 18:23:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9258, Invalid=31748, Unknown=0, NotChecked=0, Total=41006 [2021-11-25 18:23:06,558 INFO L87 Difference]: Start difference. First operand 392 states and 537 transitions. Second operand has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2021-11-25 18:23:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:23:13,456 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2021-11-25 18:23:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-25 18:23:13,458 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) Word has length 564 [2021-11-25 18:23:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:23:13,465 INFO L225 Difference]: With dead ends: 778 [2021-11-25 18:23:13,465 INFO L226 Difference]: Without dead ends: 777 [2021-11-25 18:23:13,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1584 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21364 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=22748, Invalid=65164, Unknown=0, NotChecked=0, Total=87912 [2021-11-25 18:23:13,475 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 1398 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:23:13,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1400 Valid, 1913 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:23:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-11-25 18:23:13,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 776. [2021-11-25 18:23:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 581 states have (on average 1.1721170395869192) internal successors, (681), 582 states have internal predecessors, (681), 192 states have call successors, (192), 2 states have call predecessors, (192), 2 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2021-11-25 18:23:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1065 transitions. [2021-11-25 18:23:13,522 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1065 transitions. Word has length 564 [2021-11-25 18:23:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:23:13,525 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 1065 transitions. [2021-11-25 18:23:13,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2021-11-25 18:23:13,526 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1065 transitions. [2021-11-25 18:23:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2021-11-25 18:23:13,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:23:13,578 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 94, 1, 1, 1] [2021-11-25 18:23:13,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:23:13,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:13,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:23:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:23:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1733045634, now seen corresponding path program 6 times [2021-11-25 18:23:13,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:23:13,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472766704] [2021-11-25 18:23:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:23:13,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:23:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:23:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-25 18:23:23,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:23:23,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472766704] [2021-11-25 18:23:23,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472766704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:23:23,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078224219] [2021-11-25 18:23:23,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:23:23,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:23:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:23:23,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:23:23,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:23:28,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:23:28,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:23:28,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 191 conjunts are in the unsatisfiable core [2021-11-25 18:23:28,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:23:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-25 18:23:30,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:23:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2021-11-25 18:23:54,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078224219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:23:54,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241730335] [2021-11-25 18:23:54,599 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:23:54,599 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:23:54,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:23:54,600 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:23:54,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:23:54,852 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-25 18:23:54,853 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-25 18:23:54,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:23:55,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18571#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-25 18:23:55,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:23:55,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:23:55,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2021-11-25 18:23:55,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121052535] [2021-11-25 18:23:55,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:23:55,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2021-11-25 18:23:55,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:23:55,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2021-11-25 18:23:55,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36906, Invalid=118724, Unknown=0, NotChecked=0, Total=155630 [2021-11-25 18:23:55,985 INFO L87 Difference]: Start difference. First operand 776 states and 1065 transitions. Second operand has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2021-11-25 18:24:25,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:24:25,490 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2021-11-25 18:24:25,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-25 18:24:25,492 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) Word has length 1140 [2021-11-25 18:24:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:24:25,505 INFO L225 Difference]: With dead ends: 1546 [2021-11-25 18:24:25,505 INFO L226 Difference]: Without dead ends: 1545 [2021-11-25 18:24:25,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3799 GetRequests, 3216 SyntacticMatches, 0 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79684 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=91532, Invalid=250108, Unknown=0, NotChecked=0, Total=341640 [2021-11-25 18:24:25,525 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 3161 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 2821 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:24:25,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3163 Valid, 2821 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 18:24:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2021-11-25 18:24:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1544. [2021-11-25 18:24:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1157 states have (on average 1.1694036300777875) internal successors, (1353), 1158 states have internal predecessors, (1353), 384 states have call successors, (384), 2 states have call predecessors, (384), 2 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2021-11-25 18:24:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2121 transitions. [2021-11-25 18:24:25,595 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2121 transitions. Word has length 1140 [2021-11-25 18:24:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:24:25,598 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 2121 transitions. [2021-11-25 18:24:25,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2021-11-25 18:24:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2121 transitions. [2021-11-25 18:24:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2293 [2021-11-25 18:24:25,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:24:25,672 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 190, 1, 1, 1] [2021-11-25 18:24:25,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:24:25,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:24:25,873 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:24:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:24:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash 198914658, now seen corresponding path program 7 times [2021-11-25 18:24:25,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:24:25,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375786269] [2021-11-25 18:24:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:24:25,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:24:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2021-11-25 18:25:03,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:03,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375786269] [2021-11-25 18:25:03,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375786269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:03,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555620779] [2021-11-25 18:25:03,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:25:03,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:03,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:03,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:25:03,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:25:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 4974 conjuncts, 383 conjunts are in the unsatisfiable core [2021-11-25 18:25:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:25:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2021-11-25 18:25:08,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:26:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2021-11-25 18:26:42,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555620779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:26:42,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238841382] [2021-11-25 18:26:42,787 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:26:42,788 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:26:42,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:26:42,788 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:26:42,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:26:43,037 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2021-11-25 18:26:43,039 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2021-11-25 18:26:43,040 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:26:45,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37340#(and (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)) (< 2147483646 |ULTIMATE.start_main_#t~post5#1|))' at error location [2021-11-25 18:26:45,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:26:45,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:26:45,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2021-11-25 18:26:45,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038689920] [2021-11-25 18:26:45,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:26:45,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2021-11-25 18:26:45,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2021-11-25 18:26:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147498, Invalid=458564, Unknown=0, NotChecked=0, Total=606062 [2021-11-25 18:26:45,089 INFO L87 Difference]: Start difference. First operand 1544 states and 2121 transitions. Second operand has 766 states, 765 states have (on average 2.9986928104575163) internal successors, (2294), 766 states have internal predecessors, (2294), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) [2021-11-25 18:30:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:30:43,325 INFO L93 Difference]: Finished difference Result 3082 states and 4426 transitions. [2021-11-25 18:30:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 767 states. [2021-11-25 18:30:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 766 states, 765 states have (on average 2.9986928104575163) internal successors, (2294), 766 states have internal predecessors, (2294), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) Word has length 2292 [2021-11-25 18:30:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:30:43,352 INFO L225 Difference]: With dead ends: 3082 [2021-11-25 18:30:43,352 INFO L226 Difference]: Without dead ends: 3081 [2021-11-25 18:30:43,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7639 GetRequests, 6480 SyntacticMatches, 0 SemanticMatches, 1159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306916 ImplicationChecksByTransitivity, 191.4s TimeCoverageRelationStatistics Valid=367340, Invalid=979420, Unknown=0, NotChecked=0, Total=1346760 [2021-11-25 18:30:43,446 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 5975 mSDsluCounter, 3204 mSDsCounter, 0 mSdLazyCounter, 7479 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5977 SdHoareTripleChecker+Valid, 3970 SdHoareTripleChecker+Invalid, 7680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 7479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:30:43,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5977 Valid, 3970 Invalid, 7680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [201 Valid, 7479 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 18:30:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-11-25 18:30:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 3080. [2021-11-25 18:30:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 2309 states have (on average 1.1680381117366825) internal successors, (2697), 2310 states have internal predecessors, (2697), 768 states have call successors, (768), 2 states have call predecessors, (768), 2 states have return successors, (768), 768 states have call predecessors, (768), 768 states have call successors, (768) [2021-11-25 18:30:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4233 transitions. [2021-11-25 18:30:43,582 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4233 transitions. Word has length 2292 [2021-11-25 18:30:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:30:43,590 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 4233 transitions. [2021-11-25 18:30:43,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 766 states, 765 states have (on average 2.9986928104575163) internal successors, (2294), 766 states have internal predecessors, (2294), 382 states have call successors, (764), 1 states have call predecessors, (764), 1 states have return successors, (764), 382 states have call predecessors, (764), 382 states have call successors, (764) [2021-11-25 18:30:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4233 transitions. [2021-11-25 18:30:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4597 [2021-11-25 18:30:43,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:30:43,781 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 383, 383, 383, 383, 383, 383, 383, 382, 382, 382, 1, 1, 1] [2021-11-25 18:30:43,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:30:43,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:30:43,997 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-25 18:30:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:30:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1897872418, now seen corresponding path program 8 times [2021-11-25 18:30:43,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:30:43,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092430134] [2021-11-25 18:30:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:30:43,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:30:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:33:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 877072 backedges. 0 proven. 584460 refuted. 0 times theorem prover too weak. 292612 trivial. 0 not checked. [2021-11-25 18:33:16,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:33:16,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092430134] [2021-11-25 18:33:16,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092430134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:33:16,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026815773] [2021-11-25 18:33:16,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:33:16,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:33:16,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:33:16,054 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:33:16,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_593397a8-6215-4bee-870a-eef9c8b9da6d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process