./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/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_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:42:22,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:42:22,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:42:22,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:42:22,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:42:22,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:42:22,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:42:22,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:42:22,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:42:22,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:42:22,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:42:22,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:42:22,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:42:22,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:42:22,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:42:22,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:42:22,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:42:22,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:42:22,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:42:22,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:42:22,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:42:22,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:42:22,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:42:22,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:42:22,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:42:22,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:42:22,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:42:22,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:42:22,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:42:22,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:42:22,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:42:22,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:42:22,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:42:22,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:42:22,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:42:22,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:42:22,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:42:22,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:42:22,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:42:22,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:42:22,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:42:22,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-22 02:42:22,215 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:42:22,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:42:22,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:42:22,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:42:22,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:42:22,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:42:22,218 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:42:22,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:42:22,218 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:42:22,219 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:42:22,219 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:42:22,219 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:42:22,219 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:42:22,220 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:42:22,220 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:42:22,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:42:22,221 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:42:22,221 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:42:22,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:42:22,222 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:42:22,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:42:22,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:42:22,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:42:22,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:42:22,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:42:22,224 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-22 02:42:22,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:42:22,224 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:42:22,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:42:22,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:42:22,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:42:22,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:42:22,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:42:22,226 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:42:22,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:42:22,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:42:22,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:42:22,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:42:22,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:42:22,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:42:22,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2022-11-22 02:42:22,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:42:22,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:42:22,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:42:22,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:42:22,562 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:42:22,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-22 02:42:25,698 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:42:25,925 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:42:25,926 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-22 02:42:25,933 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/data/5b934df05/d8dbb1eb207145729b3c9d2fb498a82c/FLAG6b80d7609 [2022-11-22 02:42:25,952 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/data/5b934df05/d8dbb1eb207145729b3c9d2fb498a82c [2022-11-22 02:42:25,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:42:25,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:42:25,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:42:25,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:42:25,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:42:25,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:42:25" (1/1) ... [2022-11-22 02:42:25,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f22b8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:25, skipping insertion in model container [2022-11-22 02:42:25,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:42:25" (1/1) ... [2022-11-22 02:42:25,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:42:26,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:42:26,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:42:26,197 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:42:26,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:42:26,221 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:42:26,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26 WrapperNode [2022-11-22 02:42:26,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:42:26,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:42:26,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:42:26,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:42:26,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,256 INFO L138 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-22 02:42:26,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:42:26,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:42:26,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:42:26,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:42:26,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,281 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:42:26,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:42:26,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:42:26,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:42:26,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (1/1) ... [2022-11-22 02:42:26,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:42:26,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:26,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:42:26,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:42:26,384 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2022-11-22 02:42:26,384 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2022-11-22 02:42:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2022-11-22 02:42:26,387 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2022-11-22 02:42:26,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:42:26,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:42:26,448 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:42:26,450 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:42:26,605 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:42:26,644 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:42:26,645 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:42:26,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:26 BoogieIcfgContainer [2022-11-22 02:42:26,647 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:42:26,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:42:26,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:42:26,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:42:26,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:42:25" (1/3) ... [2022-11-22 02:42:26,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15679860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:26, skipping insertion in model container [2022-11-22 02:42:26,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:42:26" (2/3) ... [2022-11-22 02:42:26,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15679860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:42:26, skipping insertion in model container [2022-11-22 02:42:26,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:42:26" (3/3) ... [2022-11-22 02:42:26,656 INFO L112 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-22 02:42:26,677 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:42:26,678 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-22 02:42:26,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:42:26,739 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@82b3cce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:42:26,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-22 02:42:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 02:42:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:42:26,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:26,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:26,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash 217860365, now seen corresponding path program 1 times [2022-11-22 02:42:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:26,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284084804] [2022-11-22 02:42:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:42:26,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:26,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284084804] [2022-11-22 02:42:26,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284084804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:26,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:26,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:42:26,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683562665] [2022-11-22 02:42:26,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:42:26,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:42:27,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:42:27,019 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.55) internal successors, (31), 24 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:42:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:27,113 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-11-22 02:42:27,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:42:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-11-22 02:42:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:27,124 INFO L225 Difference]: With dead ends: 66 [2022-11-22 02:42:27,124 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 02:42:27,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:42:27,131 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 73 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 [2022-11-22 02:42:27,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:42:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 02:42:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 27. [2022-11-22 02:42:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:42:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-22 02:42:27,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2022-11-22 02:42:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:27,191 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-22 02:42:27,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:42:27,191 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-22 02:42:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:42:27,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:27,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:27,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:42:27,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:27,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:27,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1836263215, now seen corresponding path program 1 times [2022-11-22 02:42:27,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:27,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756738610] [2022-11-22 02:42:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:27,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:42:27,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:27,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756738610] [2022-11-22 02:42:27,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756738610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:27,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:27,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:42:27,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206432000] [2022-11-22 02:42:27,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:27,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:42:27,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:42:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:42:27,281 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:42:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:27,351 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-22 02:42:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:42:27,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-22 02:42:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:27,353 INFO L225 Difference]: With dead ends: 38 [2022-11-22 02:42:27,354 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 02:42:27,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:42:27,356 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 58 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:27,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 97 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 02:42:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-11-22 02:42:27,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 02:42:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-22 02:42:27,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2022-11-22 02:42:27,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:27,368 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-22 02:42:27,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 02:42:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-22 02:42:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:42:27,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:27,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:27,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:42:27,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash -4402756, now seen corresponding path program 1 times [2022-11-22 02:42:27,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:27,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756885447] [2022-11-22 02:42:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:42:27,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:27,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756885447] [2022-11-22 02:42:27,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756885447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:27,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:27,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:42:27,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599374143] [2022-11-22 02:42:27,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:27,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:42:27,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:42:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:42:27,499 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:27,567 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-22 02:42:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:42:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2022-11-22 02:42:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:27,569 INFO L225 Difference]: With dead ends: 36 [2022-11-22 02:42:27,570 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 02:42:27,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:42:27,572 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:27,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:42:27,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 02:42:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-22 02:42:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:42:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-22 02:42:27,582 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 12 [2022-11-22 02:42:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:27,583 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-22 02:42:27,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-22 02:42:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:42:27,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:27,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:27,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:42:27,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash -136485339, now seen corresponding path program 1 times [2022-11-22 02:42:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:27,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034816349] [2022-11-22 02:42:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:27,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:42:27,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:27,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034816349] [2022-11-22 02:42:27,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034816349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:42:27,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:42:27,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:42:27,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669585742] [2022-11-22 02:42:27,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:42:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:42:27,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:27,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:42:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:42:27,662 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:27,693 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-22 02:42:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:42:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-11-22 02:42:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:27,695 INFO L225 Difference]: With dead ends: 33 [2022-11-22 02:42:27,695 INFO L226 Difference]: Without dead ends: 32 [2022-11-22 02:42:27,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:42:27,697 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:27,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:42:27,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-22 02:42:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-22 02:42:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:42:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-22 02:42:27,707 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 13 [2022-11-22 02:42:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:27,708 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-22 02:42:27,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 02:42:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-22 02:42:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 02:42:27,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:27,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:42:27,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:42:27,710 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:27,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1642845449, now seen corresponding path program 1 times [2022-11-22 02:42:27,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:27,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612157207] [2022-11-22 02:42:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:27,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:42:27,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:27,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612157207] [2022-11-22 02:42:27,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612157207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:27,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046438917] [2022-11-22 02:42:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:27,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:27,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:27,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:27,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:42:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:42:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:42:28,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:42:28,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046438917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585587391] [2022-11-22 02:42:28,288 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:28,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:28,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:28,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:28,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:29,088 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-22 02:42:29,096 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-22 02:42:29,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:29,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '578#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-22 02:42:29,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:29,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:29,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-22 02:42:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781920751] [2022-11-22 02:42:29,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:29,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:42:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:42:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:42:29,490 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:42:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:29,695 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2022-11-22 02:42:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:42:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 24 [2022-11-22 02:42:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:29,705 INFO L225 Difference]: With dead ends: 58 [2022-11-22 02:42:29,706 INFO L226 Difference]: Without dead ends: 57 [2022-11-22 02:42:29,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:42:29,714 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:29,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:42:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-22 02:42:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-11-22 02:42:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 42 states have internal predecessors, (51), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-22 02:42:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2022-11-22 02:42:29,738 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 24 [2022-11-22 02:42:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:29,739 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2022-11-22 02:42:29,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:42:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2022-11-22 02:42:29,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 02:42:29,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:29,741 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1] [2022-11-22 02:42:29,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:42:29,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:29,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:29,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:29,948 INFO L85 PathProgramCache]: Analyzing trace with hash 744004080, now seen corresponding path program 2 times [2022-11-22 02:42:29,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:29,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984796967] [2022-11-22 02:42:29,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:29,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:42:30,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:30,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984796967] [2022-11-22 02:42:30,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984796967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278477157] [2022-11-22 02:42:30,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:42:30,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:30,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:30,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:30,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:42:30,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 02:42:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:30,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:42:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:42:30,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 02:42:30,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278477157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:30,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596746913] [2022-11-22 02:42:30,810 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:30,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:30,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:30,811 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:30,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:31,210 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-22 02:42:31,213 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-22 02:42:31,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:31,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-22 02:42:31,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:31,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:31,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-22 02:42:31,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681752700] [2022-11-22 02:42:31,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:31,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:42:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:42:31,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:42:31,617 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-22 02:42:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:32,030 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2022-11-22 02:42:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 02:42:32,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 60 [2022-11-22 02:42:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:32,037 INFO L225 Difference]: With dead ends: 106 [2022-11-22 02:42:32,037 INFO L226 Difference]: Without dead ends: 105 [2022-11-22 02:42:32,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:42:32,039 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 135 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:42:32,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 215 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:42:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-22 02:42:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-11-22 02:42:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 78 states have internal predecessors, (93), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-22 02:42:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2022-11-22 02:42:32,063 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 60 [2022-11-22 02:42:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:32,063 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2022-11-22 02:42:32,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-22 02:42:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2022-11-22 02:42:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-22 02:42:32,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:32,068 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1] [2022-11-22 02:42:32,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 02:42:32,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:32,269 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:32,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1646882110, now seen corresponding path program 3 times [2022-11-22 02:42:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:32,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697517240] [2022-11-22 02:42:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:32,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-22 02:42:33,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697517240] [2022-11-22 02:42:33,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697517240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689749319] [2022-11-22 02:42:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:42:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:33,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:33,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:42:33,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:42:33,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:42:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-22 02:42:33,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-22 02:42:34,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689749319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:34,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260579283] [2022-11-22 02:42:34,196 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:34,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:34,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:34,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:34,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:34,459 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-22 02:42:34,462 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-22 02:42:34,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:34,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2248#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-22 02:42:34,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:34,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:34,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-22 02:42:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555114404] [2022-11-22 02:42:34,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:34,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-22 02:42:34,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:34,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-22 02:42:34,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=2804, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 02:42:34,926 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-22 02:42:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:35,871 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2022-11-22 02:42:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-22 02:42:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) Word has length 132 [2022-11-22 02:42:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:35,874 INFO L225 Difference]: With dead ends: 202 [2022-11-22 02:42:35,875 INFO L226 Difference]: Without dead ends: 201 [2022-11-22 02:42:35,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1400, Invalid=5080, Unknown=0, NotChecked=0, Total=6480 [2022-11-22 02:42:35,878 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 280 mSDsluCounter, 133 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 [2022-11-22 02:42:35,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 201 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:42:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-22 02:42:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-11-22 02:42:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 149 states have (on average 1.1879194630872483) internal successors, (177), 150 states have internal predecessors, (177), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-22 02:42:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 273 transitions. [2022-11-22 02:42:35,896 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 273 transitions. Word has length 132 [2022-11-22 02:42:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:35,897 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 273 transitions. [2022-11-22 02:42:35,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.977777777777778) internal successors, (134), 46 states have internal predecessors, (134), 22 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 22 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-22 02:42:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 273 transitions. [2022-11-22 02:42:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-11-22 02:42:35,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:35,908 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 1, 1, 1] [2022-11-22 02:42:35,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:42:36,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:36,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:36,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:36,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1313421786, now seen corresponding path program 4 times [2022-11-22 02:42:36,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:36,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430641707] [2022-11-22 02:42:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:36,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-22 02:42:38,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430641707] [2022-11-22 02:42:38,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430641707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228848920] [2022-11-22 02:42:38,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:42:38,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:38,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:38,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:38,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:42:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-22 02:42:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-22 02:42:39,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:42:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-22 02:42:42,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228848920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:42:42,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822838180] [2022-11-22 02:42:42,176 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:42:42,176 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:42:42,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:42:42,177 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:42:42,177 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:42:42,455 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-22 02:42:42,457 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-22 02:42:42,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:42:43,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-22 02:42:43,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:42:43,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:42:43,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-22 02:42:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246681180] [2022-11-22 02:42:43,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:42:43,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-22 02:42:43,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:42:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-22 02:42:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=8996, Unknown=0, NotChecked=0, Total=11342 [2022-11-22 02:42:43,094 INFO L87 Difference]: Start difference. First operand 200 states and 273 transitions. Second operand has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2022-11-22 02:42:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:42:45,894 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2022-11-22 02:42:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-22 02:42:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) Word has length 276 [2022-11-22 02:42:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:42:45,898 INFO L225 Difference]: With dead ends: 394 [2022-11-22 02:42:45,898 INFO L226 Difference]: Without dead ends: 393 [2022-11-22 02:42:45,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6028 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5636, Invalid=17620, Unknown=0, NotChecked=0, Total=23256 [2022-11-22 02:42:45,906 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 583 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-11-22 02:42:45,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 934 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:42:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-22 02:42:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 392. [2022-11-22 02:42:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 293 states have (on average 1.1774744027303754) internal successors, (345), 294 states have internal predecessors, (345), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-22 02:42:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 537 transitions. [2022-11-22 02:42:45,932 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 537 transitions. Word has length 276 [2022-11-22 02:42:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:42:45,933 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 537 transitions. [2022-11-22 02:42:45,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 2.989247311827957) internal successors, (278), 94 states have internal predecessors, (278), 46 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 46 states have call predecessors, (92), 46 states have call successors, (92) [2022-11-22 02:42:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 537 transitions. [2022-11-22 02:42:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-11-22 02:42:45,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:42:45,946 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 1, 1, 1] [2022-11-22 02:42:45,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:42:46,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:46,153 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:42:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:42:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash 378104594, now seen corresponding path program 5 times [2022-11-22 02:42:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:42:46,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520875025] [2022-11-22 02:42:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:42:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:42:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:42:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-22 02:42:54,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:42:54,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520875025] [2022-11-22 02:42:54,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520875025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:42:54,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161981773] [2022-11-22 02:42:54,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:42:54,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:42:54,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:42:54,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:42:54,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:42:54,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-22 02:42:54,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:42:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-22 02:42:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:42:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-22 02:42:55,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-22 02:43:04,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161981773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:04,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912707263] [2022-11-22 02:43:04,268 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:43:04,268 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:04,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:04,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:04,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:04,543 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-22 02:43:04,546 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-22 02:43:04,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:05,397 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9210#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-22 02:43:05,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:05,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:43:05,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-22 02:43:05,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114551068] [2022-11-22 02:43:05,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:05,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-22 02:43:05,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-22 02:43:05,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9258, Invalid=31748, Unknown=0, NotChecked=0, Total=41006 [2022-11-22 02:43:05,415 INFO L87 Difference]: Start difference. First operand 392 states and 537 transitions. Second operand has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2022-11-22 02:43:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:14,383 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2022-11-22 02:43:14,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-22 02:43:14,384 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) Word has length 564 [2022-11-22 02:43:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:14,391 INFO L225 Difference]: With dead ends: 778 [2022-11-22 02:43:14,391 INFO L226 Difference]: Without dead ends: 777 [2022-11-22 02:43:14,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1584 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21364 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=22748, Invalid=65164, Unknown=0, NotChecked=0, Total=87912 [2022-11-22 02:43:14,407 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1398 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:14,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 1913 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:43:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-22 02:43:14,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 776. [2022-11-22 02:43:14,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 581 states have (on average 1.1721170395869192) internal successors, (681), 582 states have internal predecessors, (681), 192 states have call successors, (192), 2 states have call predecessors, (192), 2 states have return successors, (192), 192 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-22 02:43:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1065 transitions. [2022-11-22 02:43:14,458 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1065 transitions. Word has length 564 [2022-11-22 02:43:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:14,460 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1065 transitions. [2022-11-22 02:43:14,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 2.994708994708995) internal successors, (566), 190 states have internal predecessors, (566), 94 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 94 states have call predecessors, (188), 94 states have call successors, (188) [2022-11-22 02:43:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1065 transitions. [2022-11-22 02:43:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2022-11-22 02:43:14,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:14,515 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 94, 1, 1, 1] [2022-11-22 02:43:14,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:43:14,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:43:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1733045634, now seen corresponding path program 6 times [2022-11-22 02:43:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:14,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137920416] [2022-11-22 02:43:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-22 02:43:43,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137920416] [2022-11-22 02:43:43,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137920416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:43,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625443691] [2022-11-22 02:43:43,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:43:43,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:43,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:43,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:43,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:43:48,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:43:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:43:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 191 conjunts are in the unsatisfiable core [2022-11-22 02:43:48,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-22 02:43:49,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 53392 backedges. 0 proven. 35532 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-22 02:44:20,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625443691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:20,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366988891] [2022-11-22 02:44:20,422 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:44:20,422 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:20,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:20,423 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:20,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:20,613 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-22 02:44:20,615 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-22 02:44:20,616 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:22,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18571#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-22 02:44:22,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:22,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:22,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-22 02:44:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143168771] [2022-11-22 02:44:22,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:22,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-22 02:44:22,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-22 02:44:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36906, Invalid=118724, Unknown=0, NotChecked=0, Total=155630 [2022-11-22 02:44:22,082 INFO L87 Difference]: Start difference. First operand 776 states and 1065 transitions. Second operand has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2022-11-22 02:45:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:02,483 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2022-11-22 02:45:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2022-11-22 02:45:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) Word has length 1140 [2022-11-22 02:45:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:02,495 INFO L225 Difference]: With dead ends: 1546 [2022-11-22 02:45:02,495 INFO L226 Difference]: Without dead ends: 1545 [2022-11-22 02:45:02,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3799 GetRequests, 3216 SyntacticMatches, 0 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79684 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=91532, Invalid=250108, Unknown=0, NotChecked=0, Total=341640 [2022-11-22 02:45:02,521 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 3161 mSDsluCounter, 2417 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 2821 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:02,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3163 Valid, 2821 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 02:45:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-22 02:45:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1544. [2022-11-22 02:45:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1157 states have (on average 1.1694036300777875) internal successors, (1353), 1158 states have internal predecessors, (1353), 384 states have call successors, (384), 2 states have call predecessors, (384), 2 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2022-11-22 02:45:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2121 transitions. [2022-11-22 02:45:02,582 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2121 transitions. Word has length 1140 [2022-11-22 02:45:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:02,585 INFO L495 AbstractCegarLoop]: Abstraction has 1544 states and 2121 transitions. [2022-11-22 02:45:02,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 2.9973753280839897) internal successors, (1142), 382 states have internal predecessors, (1142), 190 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 190 states have call predecessors, (380), 190 states have call successors, (380) [2022-11-22 02:45:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2121 transitions. [2022-11-22 02:45:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2293 [2022-11-22 02:45:02,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:02,662 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 190, 1, 1, 1] [2022-11-22 02:45:02,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:02,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:45:02,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-22 02:45:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:02,863 INFO L85 PathProgramCache]: Analyzing trace with hash 198914658, now seen corresponding path program 7 times [2022-11-22 02:45:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:02,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958492754] [2022-11-22 02:45:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:02,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-22 02:47:51,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:51,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958492754] [2022-11-22 02:47:51,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958492754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:47:51,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935985880] [2022-11-22 02:47:51,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:47:51,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:51,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:51,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:47:51,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d5aa5d6-f34b-4e40-ae13-3e76bf08db5f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:47:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 4974 conjuncts, 383 conjunts are in the unsatisfiable core [2022-11-22 02:47:52,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:47:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-22 02:47:55,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 217360 backedges. 0 proven. 144780 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-22 02:50:10,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935985880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:10,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990026504] [2022-11-22 02:50:10,624 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 02:50:10,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:50:10,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:50:10,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:50:10,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:50:10,843 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-22 02:50:10,844 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-22 02:50:10,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:50:13,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37340#(and (not (<= |ULTIMATE.start_main_#t~post5#1| 2147483646)) (<= 0 |ULTIMATE.start_main_~old~0#1|) (= |ULTIMATE.start_main_#t~post5#1| |ULTIMATE.start_main_~new~0#1|) (not (= ~LOCK~0 1)))' at error location [2022-11-22 02:50:13,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:50:13,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:50:13,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2022-11-22 02:50:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007299763] [2022-11-22 02:50:13,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:13,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2022-11-22 02:50:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:50:13,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2022-11-22 02:50:13,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147498, Invalid=458564, Unknown=0, NotChecked=0, Total=606062 [2022-11-22 02:50:13,845 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)