./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 4e7fbc69 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_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/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_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW --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-4e7fbc6 [2022-11-23 15:14:02,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:14:02,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:14:02,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:14:02,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:14:02,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:14:02,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:14:02,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:14:02,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:14:02,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:14:02,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:14:02,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:14:02,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:14:02,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:14:02,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:14:02,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:14:02,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:14:02,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:14:02,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:14:02,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:14:02,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:14:02,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:14:02,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:14:02,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:14:02,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:14:02,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:14:02,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:14:02,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:14:02,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:14:02,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:14:02,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:14:02,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:14:02,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:14:02,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:14:02,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:14:02,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:14:02,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:14:02,996 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:14:02,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:14:02,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:14:03,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:14:03,001 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-23 15:14:03,037 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:14:03,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:14:03,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:14:03,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:14:03,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:14:03,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:14:03,043 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:14:03,044 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:14:03,044 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:14:03,044 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:14:03,045 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:14:03,046 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:14:03,046 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:14:03,046 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:14:03,046 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:14:03,047 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:14:03,047 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:14:03,047 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:14:03,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:14:03,048 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:14:03,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:14:03,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:14:03,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:14:03,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:14:03,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:14:03,050 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-23 15:14:03,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:14:03,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:14:03,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:14:03,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:14:03,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:14:03,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:14:03,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:14:03,053 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:14:03,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:14:03,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:14:03,053 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:14:03,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:14:03,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:14:03,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:14:03,055 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_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2022-11-23 15:14:03,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:14:03,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:14:03,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:14:03,439 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:14:03,441 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:14:03,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-23 15:14:06,621 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:14:06,875 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:14:06,876 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-23 15:14:06,883 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/data/2de007e46/b43f346905c040daa5dfb1ddcba32028/FLAG5fb976de6 [2022-11-23 15:14:06,897 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/data/2de007e46/b43f346905c040daa5dfb1ddcba32028 [2022-11-23 15:14:06,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:14:06,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:14:06,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:14:06,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:14:06,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:14:06,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:14:06" (1/1) ... [2022-11-23 15:14:06,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b62c95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:06, skipping insertion in model container [2022-11-23 15:14:06,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:14:06" (1/1) ... [2022-11-23 15:14:06,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:14:06,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:14:07,128 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:14:07,133 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:14:07,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:14:07,155 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:14:07,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07 WrapperNode [2022-11-23 15:14:07,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:14:07,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:14:07,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:14:07,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:14:07,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,188 INFO L138 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-23 15:14:07,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:14:07,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:14:07,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:14:07,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:14:07,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:14:07,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:14:07,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:14:07,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:14:07,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (1/1) ... [2022-11-23 15:14:07,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:14:07,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:07,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:14:07,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:14:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2022-11-23 15:14:07,307 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2022-11-23 15:14:07,309 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2022-11-23 15:14:07,309 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2022-11-23 15:14:07,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:14:07,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:14:07,377 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:14:07,380 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:14:07,583 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:14:07,610 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:14:07,610 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:14:07,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:14:07 BoogieIcfgContainer [2022-11-23 15:14:07,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:14:07,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:14:07,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:14:07,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:14:07,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:14:06" (1/3) ... [2022-11-23 15:14:07,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656cf239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:14:07, skipping insertion in model container [2022-11-23 15:14:07,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:14:07" (2/3) ... [2022-11-23 15:14:07,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656cf239 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:14:07, skipping insertion in model container [2022-11-23 15:14:07,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:14:07" (3/3) ... [2022-11-23 15:14:07,637 INFO L112 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-23 15:14:07,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:14:07,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-23 15:14:07,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:14:07,743 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;@6cd4113d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:14:07,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 15:14:07,749 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) [2022-11-23 15:14:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:14:07,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:07,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:07,762 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)] === [2022-11-23 15:14:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash 217860365, now seen corresponding path program 1 times [2022-11-23 15:14:07,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:07,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586375189] [2022-11-23 15:14:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:07,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:14:07,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:07,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586375189] [2022-11-23 15:14:07,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586375189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:07,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:07,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:14:07,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482591826] [2022-11-23 15:14:07,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:07,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:14:08,042 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) [2022-11-23 15:14:08,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:08,189 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-23 15:14:08,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:14:08,192 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 [2022-11-23 15:14:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:08,200 INFO L225 Difference]: With dead ends: 62 [2022-11-23 15:14:08,200 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 15:14:08,204 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 [2022-11-23 15:14:08,208 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:08,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 113 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:08,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 15:14:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-11-23 15:14:08,255 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) [2022-11-23 15:14:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-23 15:14:08,258 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2022-11-23 15:14:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:08,259 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-23 15:14:08,260 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) [2022-11-23 15:14:08,260 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-23 15:14:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 15:14:08,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:08,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:08,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:14:08,263 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)] === [2022-11-23 15:14:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:08,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1836263215, now seen corresponding path program 1 times [2022-11-23 15:14:08,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:08,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276157034] [2022-11-23 15:14:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:08,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:14:08,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:08,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276157034] [2022-11-23 15:14:08,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276157034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:08,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:08,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:14:08,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131281917] [2022-11-23 15:14:08,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:08,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:14:08,392 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) [2022-11-23 15:14:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:08,464 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-11-23 15:14:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:14:08,464 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 [2022-11-23 15:14:08,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:08,470 INFO L225 Difference]: With dead ends: 42 [2022-11-23 15:14:08,471 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 15:14:08,471 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 [2022-11-23 15:14:08,473 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:08,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 103 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:14:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 15:14:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-11-23 15:14:08,485 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) [2022-11-23 15:14:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-23 15:14:08,489 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2022-11-23 15:14:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:08,492 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-23 15:14:08,492 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) [2022-11-23 15:14:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-23 15:14:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:14:08,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:08,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:08,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:14:08,495 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)] === [2022-11-23 15:14:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash -4402756, now seen corresponding path program 1 times [2022-11-23 15:14:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435418202] [2022-11-23 15:14:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:14:08,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:08,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435418202] [2022-11-23 15:14:08,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435418202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:08,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:08,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:14:08,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687259583] [2022-11-23 15:14:08,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:08,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:08,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:14:08,569 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) [2022-11-23 15:14:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:08,603 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-23 15:14:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:14:08,604 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 [2022-11-23 15:14:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:08,605 INFO L225 Difference]: With dead ends: 26 [2022-11-23 15:14:08,605 INFO L226 Difference]: Without dead ends: 25 [2022-11-23 15:14:08,605 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 [2022-11-23 15:14:08,607 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 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 [2022-11-23 15:14:08,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:14:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-23 15:14:08,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-23 15:14:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-11-23 15:14:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-23 15:14:08,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2022-11-23 15:14:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:08,616 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-23 15:14:08,616 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) [2022-11-23 15:14:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-23 15:14:08,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:14:08,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:08,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:14:08,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:14:08,618 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)] === [2022-11-23 15:14:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash -136485339, now seen corresponding path program 1 times [2022-11-23 15:14:08,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:08,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795237524] [2022-11-23 15:14:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:14:08,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:08,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795237524] [2022-11-23 15:14:08,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795237524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:08,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:08,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:14:08,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57618911] [2022-11-23 15:14:08,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:08,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:14:08,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:08,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:14:08,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:14:08,683 INFO L87 Difference]: Start difference. First operand 25 states and 32 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) [2022-11-23 15:14:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:08,722 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-11-23 15:14:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:14:08,723 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 [2022-11-23 15:14:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:08,724 INFO L225 Difference]: With dead ends: 34 [2022-11-23 15:14:08,724 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 15:14:08,724 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 [2022-11-23 15:14:08,726 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:08,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:14:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 15:14:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-23 15:14:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.2916666666666667) 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) [2022-11-23 15:14:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-23 15:14:08,735 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2022-11-23 15:14:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:08,736 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-23 15:14:08,736 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) [2022-11-23 15:14:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-23 15:14:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:14:08,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:08,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 15:14:08,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:14:08,739 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:14:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -611398536, now seen corresponding path program 1 times [2022-11-23 15:14:08,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:08,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106842958] [2022-11-23 15:14:08,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:14:08,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:08,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106842958] [2022-11-23 15:14:08,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106842958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:08,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639610300] [2022-11-23 15:14:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:08,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:08,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:08,965 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:08,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:14:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:14:09,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:14:09,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:14:09,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639610300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954093223] [2022-11-23 15:14:09,336 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:14:09,339 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:09,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:09,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:09,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:14:09,982 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-23 15:14:09,984 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-23 15:14:09,987 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:14:10,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '564#(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 [2022-11-23 15:14:10,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:14:10,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:14:10,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-23 15:14:10,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000088652] [2022-11-23 15:14:10,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:14:10,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:14:10,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:14:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-23 15:14:10,420 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-11-23 15:14:10,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:10,590 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2022-11-23 15:14:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:14:10,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 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 25 [2022-11-23 15:14:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:10,592 INFO L225 Difference]: With dead ends: 58 [2022-11-23 15:14:10,592 INFO L226 Difference]: Without dead ends: 57 [2022-11-23 15:14:10,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-11-23 15:14:10,594 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:10,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 117 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-23 15:14:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-23 15:14:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 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) [2022-11-23 15:14:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2022-11-23 15:14:10,605 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 25 [2022-11-23 15:14:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:10,606 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2022-11-23 15:14:10,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-11-23 15:14:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2022-11-23 15:14:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 15:14:10,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:10,608 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2022-11-23 15:14:10,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:10,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:10,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:14:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1589290097, now seen corresponding path program 2 times [2022-11-23 15:14:10,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:10,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878018422] [2022-11-23 15:14:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:10,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:14:11,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878018422] [2022-11-23 15:14:11,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878018422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332870330] [2022-11-23 15:14:11,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:14:11,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:11,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:11,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:11,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:14:11,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:14:11,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:14:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:14:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:14:11,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:14:11,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332870330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:11,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889614747] [2022-11-23 15:14:11,591 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:14:11,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:11,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:11,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:11,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:14:11,910 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-23 15:14:11,912 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-23 15:14:11,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:14:12,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1111#(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 [2022-11-23 15:14:12,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:14:12,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:14:12,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-23 15:14:12,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418123889] [2022-11-23 15:14:12,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:14:12,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 15:14:12,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 15:14:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:14:12,388 INFO L87 Difference]: Start difference. First operand 57 states and 76 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 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) [2022-11-23 15:14:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:12,757 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2022-11-23 15:14:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:14:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 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 61 [2022-11-23 15:14:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:12,760 INFO L225 Difference]: With dead ends: 106 [2022-11-23 15:14:12,760 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 15:14:12,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 15:14:12,761 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 158 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:12,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 201 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:14:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 15:14:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-23 15:14:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.205128205128205) internal successors, (94), 79 states have internal predecessors, (94), 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) [2022-11-23 15:14:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2022-11-23 15:14:12,793 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 61 [2022-11-23 15:14:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:12,795 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2022-11-23 15:14:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 22 states have internal predecessors, (64), 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) [2022-11-23 15:14:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2022-11-23 15:14:12,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-23 15:14:12,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:12,802 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1] [2022-11-23 15:14:12,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:14:13,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:14:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash -486262045, now seen corresponding path program 3 times [2022-11-23 15:14:13,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:13,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085584228] [2022-11-23 15:14:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:14:13,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:13,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085584228] [2022-11-23 15:14:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085584228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75180019] [2022-11-23 15:14:13,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:14:13,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:13,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:13,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:13,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:14:13,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:14:13,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:14:13,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:14:13,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:14:14,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 15:14:14,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75180019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:14,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930370968] [2022-11-23 15:14:14,887 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:14:14,888 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:14,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:14,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:14,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:14:15,152 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-23 15:14:15,154 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-23 15:14:15,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:14:15,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2246#(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 [2022-11-23 15:14:15,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:14:15,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:14:15,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-23 15:14:15,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952843214] [2022-11-23 15:14:15,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:14:15,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 15:14:15,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 15:14:15,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 15:14:15,937 INFO L87 Difference]: Start difference. First operand 105 states and 142 transitions. Second operand has 46 states, 45 states have (on average 3.022222222222222) internal successors, (136), 46 states have internal predecessors, (136), 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) [2022-11-23 15:14:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:16,951 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2022-11-23 15:14:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 15:14:16,952 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.022222222222222) internal successors, (136), 46 states have internal predecessors, (136), 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 133 [2022-11-23 15:14:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:16,954 INFO L225 Difference]: With dead ends: 202 [2022-11-23 15:14:16,954 INFO L226 Difference]: Without dead ends: 201 [2022-11-23 15:14:16,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 353 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1392, Invalid=4928, Unknown=0, NotChecked=0, Total=6320 [2022-11-23 15:14:16,961 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 184 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:16,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 349 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:14:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-23 15:14:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-23 15:14:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 150 states have (on average 1.1866666666666668) internal successors, (178), 151 states have internal predecessors, (178), 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) [2022-11-23 15:14:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 274 transitions. [2022-11-23 15:14:16,993 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 274 transitions. Word has length 133 [2022-11-23 15:14:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:16,994 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 274 transitions. [2022-11-23 15:14:16,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.022222222222222) internal successors, (136), 46 states have internal predecessors, (136), 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) [2022-11-23 15:14:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 274 transitions. [2022-11-23 15:14:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-11-23 15:14:17,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:17,011 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1] [2022-11-23 15:14:17,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:17,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:14:17,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:14:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:17,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2061369799, now seen corresponding path program 4 times [2022-11-23 15:14:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:17,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119766718] [2022-11-23 15:14:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:17,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:14:19,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:19,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119766718] [2022-11-23 15:14:19,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119766718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:19,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170927082] [2022-11-23 15:14:19,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:14:19,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:19,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:19,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:19,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:14:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 15:14:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:14:20,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-23 15:14:22,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170927082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15158357] [2022-11-23 15:14:22,924 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:14:22,924 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:22,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:22,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:22,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:14:23,207 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-23 15:14:23,209 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-23 15:14:23,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:14:24,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4557#(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 [2022-11-23 15:14:24,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:14:24,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:14:24,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-23 15:14:24,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135892366] [2022-11-23 15:14:24,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:14:24,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-23 15:14:24,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-23 15:14:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2339, Invalid=8791, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 15:14:24,797 INFO L87 Difference]: Start difference. First operand 201 states and 274 transitions. Second operand has 94 states, 93 states have (on average 3.010752688172043) internal successors, (280), 94 states have internal predecessors, (280), 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) [2022-11-23 15:14:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:27,458 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2022-11-23 15:14:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-23 15:14:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 3.010752688172043) internal successors, (280), 94 states have internal predecessors, (280), 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 277 [2022-11-23 15:14:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:27,463 INFO L225 Difference]: With dead ends: 394 [2022-11-23 15:14:27,463 INFO L226 Difference]: Without dead ends: 393 [2022-11-23 15:14:27,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 749 SyntacticMatches, 23 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9018 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5628, Invalid=17324, Unknown=0, NotChecked=0, Total=22952 [2022-11-23 15:14:27,470 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 701 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:27,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1502 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:14:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-23 15:14:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-11-23 15:14:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 294 states have (on average 1.1768707482993197) internal successors, (346), 295 states have internal predecessors, (346), 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) [2022-11-23 15:14:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 538 transitions. [2022-11-23 15:14:27,500 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 538 transitions. Word has length 277 [2022-11-23 15:14:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:27,501 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 538 transitions. [2022-11-23 15:14:27,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 3.010752688172043) internal successors, (280), 94 states have internal predecessors, (280), 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) [2022-11-23 15:14:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 538 transitions. [2022-11-23 15:14:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-11-23 15:14:27,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:27,516 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 1, 1, 1] [2022-11-23 15:14:27,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:27,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:27,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:14:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1163659377, now seen corresponding path program 5 times [2022-11-23 15:14:27,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:27,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640039740] [2022-11-23 15:14:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:27,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:14:36,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:36,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640039740] [2022-11-23 15:14:36,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640039740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:36,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601325610] [2022-11-23 15:14:36,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:14:36,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:36,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:36,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:36,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:14:36,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-23 15:14:36,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:14:36,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-23 15:14:36,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:14:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:14:37,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:14:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-23 15:14:45,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601325610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:14:45,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [848963556] [2022-11-23 15:14:45,583 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:14:45,583 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:14:45,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:14:45,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:14:45,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:14:45,814 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-23 15:14:45,816 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-23 15:14:45,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:14:49,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9220#(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 [2022-11-23 15:14:49,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:14:49,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:14:49,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-23 15:14:49,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053776705] [2022-11-23 15:14:49,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:14:49,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-23 15:14:49,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:49,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-23 15:14:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9251, Invalid=31351, Unknown=0, NotChecked=0, Total=40602 [2022-11-23 15:14:49,573 INFO L87 Difference]: Start difference. First operand 393 states and 538 transitions. Second operand has 190 states, 189 states have (on average 3.005291005291005) internal successors, (568), 190 states have internal predecessors, (568), 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) [2022-11-23 15:14:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:58,482 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2022-11-23 15:14:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-23 15:14:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 3.005291005291005) internal successors, (568), 190 states have internal predecessors, (568), 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 565 [2022-11-23 15:14:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:58,496 INFO L225 Difference]: With dead ends: 778 [2022-11-23 15:14:58,496 INFO L226 Difference]: Without dead ends: 777 [2022-11-23 15:14:58,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1882 GetRequests, 1541 SyntacticMatches, 47 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34242 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=22740, Invalid=64580, Unknown=0, NotChecked=0, Total=87320 [2022-11-23 15:14:58,509 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1170 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:58,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 1491 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:14:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-23 15:14:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 777. [2022-11-23 15:14:58,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 582 states have (on average 1.1718213058419245) internal successors, (682), 583 states have internal predecessors, (682), 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) [2022-11-23 15:14:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1066 transitions. [2022-11-23 15:14:58,551 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1066 transitions. Word has length 565 [2022-11-23 15:14:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:58,553 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1066 transitions. [2022-11-23 15:14:58,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 3.005291005291005) internal successors, (568), 190 states have internal predecessors, (568), 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) [2022-11-23 15:14:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1066 transitions. [2022-11-23 15:14:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2022-11-23 15:14:58,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:58,610 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 1, 1, 1] [2022-11-23 15:14:58,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:58,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:14:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2110160097, now seen corresponding path program 6 times [2022-11-23 15:14:58,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:58,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242958459] [2022-11-23 15:14:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-23 15:15:32,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242958459] [2022-11-23 15:15:32,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242958459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132716164] [2022-11-23 15:15:32,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:15:32,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:32,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:32,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:32,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:15:36,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:15:36,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:15:36,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 191 conjunts are in the unsatisfiable core [2022-11-23 15:15:36,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-23 15:15:37,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:16:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-23 15:16:08,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132716164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:16:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406588398] [2022-11-23 15:16:08,537 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:16:08,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:16:08,538 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:16:08,538 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:16:08,538 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:16:08,718 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-23 15:16:08,719 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-23 15:16:08,720 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:16:20,653 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18587#(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 [2022-11-23 15:16:20,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:16:20,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:16:20,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-23 15:16:20,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659590428] [2022-11-23 15:16:20,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:16:20,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-23 15:16:20,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:16:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-23 15:16:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36899, Invalid=117943, Unknown=0, NotChecked=0, Total=154842 [2022-11-23 15:16:20,681 INFO L87 Difference]: Start difference. First operand 777 states and 1066 transitions. Second operand has 382 states, 381 states have (on average 3.0026246719160103) internal successors, (1144), 382 states have internal predecessors, (1144), 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) [2022-11-23 15:16:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:16:59,915 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2022-11-23 15:16:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-11-23 15:16:59,917 INFO L78 Accepts]: Start accepts. Automaton has has 382 states, 381 states have (on average 3.0026246719160103) internal successors, (1144), 382 states have internal predecessors, (1144), 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 1141 [2022-11-23 15:16:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:16:59,934 INFO L225 Difference]: With dead ends: 1546 [2022-11-23 15:16:59,934 INFO L226 Difference]: Without dead ends: 1545 [2022-11-23 15:16:59,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3802 GetRequests, 3125 SyntacticMatches, 95 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133074 ImplicationChecksByTransitivity, 73.2s TimeCoverageRelationStatistics Valid=91524, Invalid=248948, Unknown=0, NotChecked=0, Total=340472 [2022-11-23 15:16:59,963 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 2803 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2805 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 3077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:16:59,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2805 Valid, 2842 Invalid, 3077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2964 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 15:16:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-23 15:17:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1545. [2022-11-23 15:17:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1158 states have (on average 1.1692573402417963) internal successors, (1354), 1159 states have internal predecessors, (1354), 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) [2022-11-23 15:17:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2122 transitions. [2022-11-23 15:17:00,056 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2122 transitions. Word has length 1141 [2022-11-23 15:17:00,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:00,059 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2122 transitions. [2022-11-23 15:17:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 382 states, 381 states have (on average 3.0026246719160103) internal successors, (1144), 382 states have internal predecessors, (1144), 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) [2022-11-23 15:17:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2122 transitions. [2022-11-23 15:17:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2294 [2022-11-23 15:17:00,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:00,101 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 1, 1, 1] [2022-11-23 15:17:00,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:17:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:17:00,302 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-11-23 15:17:00,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1871387199, now seen corresponding path program 7 times [2022-11-23 15:17:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:00,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061529948] [2022-11-23 15:17:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:00,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-23 15:20:16,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:20:16,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061529948] [2022-11-23 15:20:16,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061529948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:20:16,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294533265] [2022-11-23 15:20:16,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 15:20:16,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:20:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:20:16,532 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:20:16,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3723a12-9bc9-4f78-bb40-ec36a05f26da/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:20:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:20:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 4975 conjuncts, 383 conjunts are in the unsatisfiable core [2022-11-23 15:20:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:20:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-23 15:20:19,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:22:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-23 15:22:20,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294533265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:22:20,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [402807953] [2022-11-23 15:22:20,355 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:22:20,355 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:22:20,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:22:20,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:22:20,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:22:20,561 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-23 15:22:20,563 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-23 15:22:20,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:23:04,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37362#(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 [2022-11-23 15:23:04,111 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:23:04,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:23:04,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2022-11-23 15:23:04,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033934009] [2022-11-23 15:23:04,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:23:04,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2022-11-23 15:23:04,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:23:04,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2022-11-23 15:23:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147491, Invalid=457015, Unknown=0, NotChecked=0, Total=604506 [2022-11-23 15:23:04,209 INFO L87 Difference]: Start difference. First operand 1545 states and 2122 transitions. Second operand has 766 states, 765 states have (on average 3.0013071895424837) internal successors, (2296), 766 states have internal predecessors, (2296), 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)