./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 38b53e6a 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_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/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_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur --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-38b53e6 [2022-11-25 22:28:33,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:28:33,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:28:33,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:28:33,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:28:33,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:28:33,879 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:28:33,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:28:33,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:28:33,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:28:33,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:28:33,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:28:33,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:28:33,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:28:33,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:28:33,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:28:33,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:28:33,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:28:33,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:28:33,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:28:33,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:28:33,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:28:33,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:28:33,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:28:33,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:28:33,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:28:33,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:28:33,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:28:33,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:28:33,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:28:33,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:28:33,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:28:33,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:28:33,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:28:33,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:28:33,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:28:33,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:28:33,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:28:33,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:28:33,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:28:33,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:28:33,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-25 22:28:33,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:28:33,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:28:33,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:28:33,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:28:33,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:28:33,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:28:33,985 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:28:33,986 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:28:33,986 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:28:33,986 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:28:33,987 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:28:33,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:28:33,988 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:28:33,988 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:28:33,988 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:28:33,988 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:28:33,989 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:28:33,989 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:28:33,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:28:33,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:28:33,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:28:33,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:28:33,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:28:33,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:28:33,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:28:33,991 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 22:28:33,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:28:33,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:28:33,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:28:33,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:28:33,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:28:33,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:28:33,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:28:33,994 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:28:33,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:28:33,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:28:33,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:28:33,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:28:33,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:28:33,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:28:33,995 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_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2022-11-25 22:28:34,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:28:34,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:28:34,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:28:34,394 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:28:34,394 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:28:34,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-25 22:28:37,394 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:28:37,605 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:28:37,606 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-25 22:28:37,612 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/data/a7f6a8327/90c756653cf7422aad420dfe01d5a774/FLAGed7b9f394 [2022-11-25 22:28:37,632 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/data/a7f6a8327/90c756653cf7422aad420dfe01d5a774 [2022-11-25 22:28:37,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:28:37,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:28:37,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:28:37,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:28:37,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:28:37,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@492afcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37, skipping insertion in model container [2022-11-25 22:28:37,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:28:37,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:28:37,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:28:37,864 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:28:37,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:28:37,890 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:28:37,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37 WrapperNode [2022-11-25 22:28:37,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:28:37,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:28:37,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:28:37,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:28:37,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,918 INFO L138 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-25 22:28:37,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:28:37,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:28:37,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:28:37,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:28:37,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,935 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:28:37,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:28:37,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:28:37,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:28:37,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (1/1) ... [2022-11-25 22:28:37,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:28:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:37,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:28:38,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:28:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2022-11-25 22:28:38,029 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2022-11-25 22:28:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2022-11-25 22:28:38,032 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2022-11-25 22:28:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:28:38,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:28:38,100 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:28:38,103 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:28:38,301 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:28:38,344 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:28:38,347 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 22:28:38,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:28:38 BoogieIcfgContainer [2022-11-25 22:28:38,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:28:38,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:28:38,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:28:38,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:28:38,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:28:37" (1/3) ... [2022-11-25 22:28:38,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b6ac8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:28:38, skipping insertion in model container [2022-11-25 22:28:38,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:28:37" (2/3) ... [2022-11-25 22:28:38,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b6ac8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:28:38, skipping insertion in model container [2022-11-25 22:28:38,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:28:38" (3/3) ... [2022-11-25 22:28:38,376 INFO L112 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-11-25 22:28:38,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:28:38,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-25 22:28:38,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:28:38,462 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;@e8532dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:28:38,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 22:28:38,467 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) [2022-11-25 22:28:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:28:38,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:38,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:38,476 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)] === [2022-11-25 22:28:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 217860365, now seen corresponding path program 1 times [2022-11-25 22:28:38,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:38,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532449703] [2022-11-25 22:28:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:38,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:38,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:38,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532449703] [2022-11-25 22:28:38,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532449703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:38,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:38,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009630160] [2022-11-25 22:28:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:38,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:38,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:38,737 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) [2022-11-25 22:28:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:38,815 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-11-25 22:28:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:38,818 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 [2022-11-25 22:28:38,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:38,826 INFO L225 Difference]: With dead ends: 62 [2022-11-25 22:28:38,826 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 22:28:38,830 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 [2022-11-25 22:28:38,833 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:38,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 113 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:28:38,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 22:28:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-11-25 22:28:38,875 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) [2022-11-25 22:28:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-25 22:28:38,877 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2022-11-25 22:28:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:38,878 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-25 22:28:38,878 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) [2022-11-25 22:28:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-25 22:28:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 22:28:38,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:38,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:38,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:28:38,882 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)] === [2022-11-25 22:28:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1836263215, now seen corresponding path program 1 times [2022-11-25 22:28:38,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:38,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85509311] [2022-11-25 22:28:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:38,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:38,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85509311] [2022-11-25 22:28:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85509311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:38,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:38,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270288956] [2022-11-25 22:28:38,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:38,956 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) [2022-11-25 22:28:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:38,997 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-11-25 22:28:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:38,998 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 [2022-11-25 22:28:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:38,999 INFO L225 Difference]: With dead ends: 42 [2022-11-25 22:28:38,999 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 22:28:38,999 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 [2022-11-25 22:28:39,001 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 [2022-11-25 22:28:39,002 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] [2022-11-25 22:28:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 22:28:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-11-25 22:28:39,008 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) [2022-11-25 22:28:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-11-25 22:28:39,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2022-11-25 22:28:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-11-25 22:28:39,010 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) [2022-11-25 22:28:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-11-25 22:28:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 22:28:39,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:39,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:39,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 22:28:39,012 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)] === [2022-11-25 22:28:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -4402756, now seen corresponding path program 1 times [2022-11-25 22:28:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760878476] [2022-11-25 22:28:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:39,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:39,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:39,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:39,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760878476] [2022-11-25 22:28:39,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760878476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:39,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:39,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:39,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153809424] [2022-11-25 22:28:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:39,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:39,139 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) [2022-11-25 22:28:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:39,204 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-25 22:28:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:39,205 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 [2022-11-25 22:28:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:39,206 INFO L225 Difference]: With dead ends: 26 [2022-11-25 22:28:39,206 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 22:28:39,207 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 [2022-11-25 22:28:39,208 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 [2022-11-25 22:28:39,209 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] [2022-11-25 22:28:39,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 22:28:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-25 22:28:39,215 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) [2022-11-25 22:28:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-25 22:28:39,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2022-11-25 22:28:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:39,217 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-25 22:28:39,217 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) [2022-11-25 22:28:39,217 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-25 22:28:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 22:28:39,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:39,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:28:39,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 22:28:39,219 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)] === [2022-11-25 22:28:39,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:39,220 INFO L85 PathProgramCache]: Analyzing trace with hash -136485339, now seen corresponding path program 1 times [2022-11-25 22:28:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:39,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079605671] [2022-11-25 22:28:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:39,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:28:39,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:39,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079605671] [2022-11-25 22:28:39,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079605671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:28:39,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:28:39,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:28:39,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628217441] [2022-11-25 22:28:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:28:39,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:28:39,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:28:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:28:39,280 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) [2022-11-25 22:28:39,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:39,317 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-11-25 22:28:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:28:39,318 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 [2022-11-25 22:28:39,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:39,319 INFO L225 Difference]: With dead ends: 34 [2022-11-25 22:28:39,319 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 22:28:39,319 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 [2022-11-25 22:28:39,321 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 [2022-11-25 22:28:39,321 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] [2022-11-25 22:28:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 22:28:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-25 22:28:39,328 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) [2022-11-25 22:28:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-25 22:28:39,330 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2022-11-25 22:28:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:39,330 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-25 22:28:39,331 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) [2022-11-25 22:28:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-25 22:28:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:28:39,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:39,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 22:28:39,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 22:28:39,333 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)] === [2022-11-25 22:28:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:39,333 INFO L85 PathProgramCache]: Analyzing trace with hash -611398536, now seen corresponding path program 1 times [2022-11-25 22:28:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:39,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447348432] [2022-11-25 22:28:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:28:39,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447348432] [2022-11-25 22:28:39,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447348432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882315692] [2022-11-25 22:28:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:39,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:39,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:28:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:28:39,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:28:39,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 22:28:39,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882315692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147077454] [2022-11-25 22:28:39,898 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:39,899 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:39,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:39,908 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:39,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:40,542 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-25 22:28:40,548 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-25 22:28:40,551 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:40,938 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 [2022-11-25 22:28:40,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:40,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:40,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 22:28:40,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74130548] [2022-11-25 22:28:40,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:40,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:28:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:28:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-25 22:28:40,941 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) [2022-11-25 22:28:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:41,091 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2022-11-25 22:28:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 22:28:41,091 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 [2022-11-25 22:28:41,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:41,093 INFO L225 Difference]: With dead ends: 58 [2022-11-25 22:28:41,093 INFO L226 Difference]: Without dead ends: 57 [2022-11-25 22:28:41,094 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 [2022-11-25 22:28:41,095 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:41,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 117 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:28:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-25 22:28:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-25 22:28:41,103 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) [2022-11-25 22:28:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2022-11-25 22:28:41,105 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 25 [2022-11-25 22:28:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:41,106 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2022-11-25 22:28:41,106 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) [2022-11-25 22:28:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2022-11-25 22:28:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 22:28:41,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:41,108 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2022-11-25 22:28:41,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 22:28:41,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:41,314 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)] === [2022-11-25 22:28:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:41,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1589290097, now seen corresponding path program 2 times [2022-11-25 22:28:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:41,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151468097] [2022-11-25 22:28:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:41,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 22:28:41,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151468097] [2022-11-25 22:28:41,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151468097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:41,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710507539] [2022-11-25 22:28:41,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:28:41,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:41,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:41,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:41,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:28:41,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 22:28:41,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:28:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 22:28:41,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 22:28:42,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710507539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:42,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360836327] [2022-11-25 22:28:42,087 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:42,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:42,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:42,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:42,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:42,504 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-25 22:28:42,506 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-25 22:28:42,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:42,966 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 [2022-11-25 22:28:42,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:42,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:42,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-25 22:28:42,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114753847] [2022-11-25 22:28:42,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:42,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 22:28:42,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:42,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 22:28:42,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 22:28:42,969 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) [2022-11-25 22:28:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:43,360 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2022-11-25 22:28:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 22:28:43,361 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 [2022-11-25 22:28:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:43,362 INFO L225 Difference]: With dead ends: 106 [2022-11-25 22:28:43,362 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 22:28:43,363 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 [2022-11-25 22:28:43,364 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 149 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:43,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 201 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:28:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 22:28:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-25 22:28:43,376 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) [2022-11-25 22:28:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2022-11-25 22:28:43,378 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 61 [2022-11-25 22:28:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:43,379 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2022-11-25 22:28:43,379 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) [2022-11-25 22:28:43,380 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2022-11-25 22:28:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-25 22:28:43,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:43,382 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1] [2022-11-25 22:28:43,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:43,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 22:28:43,588 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)] === [2022-11-25 22:28:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:43,589 INFO L85 PathProgramCache]: Analyzing trace with hash -486262045, now seen corresponding path program 3 times [2022-11-25 22:28:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:43,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138447583] [2022-11-25 22:28:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-25 22:28:44,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:44,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138447583] [2022-11-25 22:28:44,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138447583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:44,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832500505] [2022-11-25 22:28:44,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:28:44,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:44,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:44,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:28:44,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:28:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:28:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 22:28:44,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-25 22:28:44,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-25 22:28:45,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832500505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191253819] [2022-11-25 22:28:45,369 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:45,369 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:45,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:45,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:45,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:45,660 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-25 22:28:45,662 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-25 22:28:45,669 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:46,378 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 [2022-11-25 22:28:46,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:46,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:46,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-11-25 22:28:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606227338] [2022-11-25 22:28:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:46,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 22:28:46,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 22:28:46,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 22:28:46,384 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) [2022-11-25 22:28:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:47,308 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2022-11-25 22:28:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 22:28:47,309 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 [2022-11-25 22:28:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:47,312 INFO L225 Difference]: With dead ends: 202 [2022-11-25 22:28:47,312 INFO L226 Difference]: Without dead ends: 201 [2022-11-25 22:28:47,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 353 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1392, Invalid=4928, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 22:28:47,315 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 170 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:47,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 349 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:28:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-25 22:28:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-25 22:28:47,335 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) [2022-11-25 22:28:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 274 transitions. [2022-11-25 22:28:47,337 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 274 transitions. Word has length 133 [2022-11-25 22:28:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:47,338 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 274 transitions. [2022-11-25 22:28:47,339 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) [2022-11-25 22:28:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 274 transitions. [2022-11-25 22:28:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-11-25 22:28:47,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:47,350 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1] [2022-11-25 22:28:47,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 22:28:47,557 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)] === [2022-11-25 22:28:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2061369799, now seen corresponding path program 4 times [2022-11-25 22:28:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:47,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657063996] [2022-11-25 22:28:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-25 22:28:50,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:28:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657063996] [2022-11-25 22:28:50,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657063996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:28:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576609919] [2022-11-25 22:28:50,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:28:50,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:50,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:28:50,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:28:50,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:28:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:28:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 22:28:50,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:28:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-25 22:28:50,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:28:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-25 22:28:53,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576609919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:28:53,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1864221015] [2022-11-25 22:28:53,345 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:28:53,346 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:28:53,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:28:53,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:28:53,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:28:53,577 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-25 22:28:53,579 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-25 22:28:53,580 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:28:55,058 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 [2022-11-25 22:28:55,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:28:55,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:28:55,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-11-25 22:28:55,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381014082] [2022-11-25 22:28:55,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:28:55,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-25 22:28:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:28:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-25 22:28:55,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2339, Invalid=8791, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 22:28:55,068 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) [2022-11-25 22:28:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:28:57,618 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2022-11-25 22:28:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-25 22:28:57,619 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 [2022-11-25 22:28:57,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:28:57,623 INFO L225 Difference]: With dead ends: 394 [2022-11-25 22:28:57,623 INFO L226 Difference]: Without dead ends: 393 [2022-11-25 22:28:57,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 749 SyntacticMatches, 23 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9018 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5628, Invalid=17324, Unknown=0, NotChecked=0, Total=22952 [2022-11-25 22:28:57,629 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 671 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:28:57,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1502 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:28:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-25 22:28:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-11-25 22:28:57,675 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) [2022-11-25 22:28:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 538 transitions. [2022-11-25 22:28:57,682 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 538 transitions. Word has length 277 [2022-11-25 22:28:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:28:57,684 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 538 transitions. [2022-11-25 22:28:57,685 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) [2022-11-25 22:28:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 538 transitions. [2022-11-25 22:28:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-11-25 22:28:57,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:28:57,704 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 1, 1, 1] [2022-11-25 22:28:57,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:28:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:28:57,911 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)] === [2022-11-25 22:28:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:28:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1163659377, now seen corresponding path program 5 times [2022-11-25 22:28:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:28:57,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300329286] [2022-11-25 22:28:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:28:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:28:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-25 22:29:05,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300329286] [2022-11-25 22:29:05,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300329286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506755690] [2022-11-25 22:29:05,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:29:05,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:05,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:05,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:05,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:29:06,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-25 22:29:06,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:29:06,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-25 22:29:06,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:29:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-25 22:29:07,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:29:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-25 22:29:15,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506755690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:29:15,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597815711] [2022-11-25 22:29:15,266 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:29:15,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:29:15,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:29:15,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:29:15,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:29:15,469 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-25 22:29:15,471 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-25 22:29:15,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:29:19,164 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 [2022-11-25 22:29:19,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:29:19,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:29:19,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-11-25 22:29:19,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916214832] [2022-11-25 22:29:19,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:29:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-25 22:29:19,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:29:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-25 22:29:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9251, Invalid=31351, Unknown=0, NotChecked=0, Total=40602 [2022-11-25 22:29:19,182 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) [2022-11-25 22:29:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:29:28,022 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2022-11-25 22:29:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-25 22:29:28,023 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 [2022-11-25 22:29:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:29:28,028 INFO L225 Difference]: With dead ends: 778 [2022-11-25 22:29:28,029 INFO L226 Difference]: Without dead ends: 777 [2022-11-25 22:29:28,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1882 GetRequests, 1541 SyntacticMatches, 47 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34242 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=22740, Invalid=64580, Unknown=0, NotChecked=0, Total=87320 [2022-11-25 22:29:28,072 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1121 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:29:28,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1491 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:29:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-25 22:29:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 777. [2022-11-25 22:29:28,100 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) [2022-11-25 22:29:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1066 transitions. [2022-11-25 22:29:28,104 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1066 transitions. Word has length 565 [2022-11-25 22:29:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:29:28,106 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1066 transitions. [2022-11-25 22:29:28,107 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) [2022-11-25 22:29:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1066 transitions. [2022-11-25 22:29:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2022-11-25 22:29:28,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:29:28,158 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 1, 1, 1] [2022-11-25 22:29:28,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:29:28,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:28,366 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)] === [2022-11-25 22:29:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:29:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2110160097, now seen corresponding path program 6 times [2022-11-25 22:29:28,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:29:28,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453768285] [2022-11-25 22:29:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:29:28,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:29:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:30:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-25 22:30:00,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:30:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453768285] [2022-11-25 22:30:00,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453768285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:30:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057122294] [2022-11-25 22:30:00,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:30:00,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:30:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:30:00,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:30:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:30:04,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:30:04,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:30:04,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 191 conjunts are in the unsatisfiable core [2022-11-25 22:30:04,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-25 22:30:06,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:30:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-11-25 22:30:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057122294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:30:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570137625] [2022-11-25 22:30:36,297 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:30:36,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:30:36,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:30:36,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:30:36,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:30:36,529 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-25 22:30:36,530 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-25 22:30:36,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:30:48,410 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 [2022-11-25 22:30:48,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:30:48,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:30:48,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-11-25 22:30:48,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411801722] [2022-11-25 22:30:48,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:30:48,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-11-25 22:30:48,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:30:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-11-25 22:30:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36899, Invalid=117943, Unknown=0, NotChecked=0, Total=154842 [2022-11-25 22:30:48,445 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) [2022-11-25 22:31:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:27,642 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2022-11-25 22:31:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-11-25 22:31:27,643 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 [2022-11-25 22:31:27,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:27,652 INFO L225 Difference]: With dead ends: 1546 [2022-11-25 22:31:27,652 INFO L226 Difference]: Without dead ends: 1545 [2022-11-25 22:31:27,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3802 GetRequests, 3125 SyntacticMatches, 95 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133074 ImplicationChecksByTransitivity, 72.2s TimeCoverageRelationStatistics Valid=91524, Invalid=248948, Unknown=0, NotChecked=0, Total=340472 [2022-11-25 22:31:27,676 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 2702 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:27,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 2842 Invalid, 2977 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 2964 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 22:31:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-25 22:31:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1545. [2022-11-25 22:31:27,728 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) [2022-11-25 22:31:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2122 transitions. [2022-11-25 22:31:27,736 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2122 transitions. Word has length 1141 [2022-11-25 22:31:27,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:27,739 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2122 transitions. [2022-11-25 22:31:27,741 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) [2022-11-25 22:31:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2122 transitions. [2022-11-25 22:31:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2294 [2022-11-25 22:31:27,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:27,849 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 1, 1, 1] [2022-11-25 22:31:27,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:28,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 22:31:28,050 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)] === [2022-11-25 22:31:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1871387199, now seen corresponding path program 7 times [2022-11-25 22:31:28,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:28,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198161467] [2022-11-25 22:31:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-25 22:34:37,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:34:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198161467] [2022-11-25 22:34:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198161467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:34:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829395322] [2022-11-25 22:34:37,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:34:37,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:34:37,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:34:37,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:34:37,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96ae9e18-8f2e-4d8d-a398-d004bd251f9b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:34:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:34:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 4975 conjuncts, 383 conjunts are in the unsatisfiable core [2022-11-25 22:34:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:34:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-25 22:34:41,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-11-25 22:36:39,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829395322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:39,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76204723] [2022-11-25 22:36:39,156 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-25 22:36:39,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:39,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:39,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:39,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:39,453 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-11-25 22:36:39,455 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-11-25 22:36:39,456 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:37:21,851 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 [2022-11-25 22:37:21,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:37:21,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:37:21,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2022-11-25 22:37:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628142122] [2022-11-25 22:37:21,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:37:21,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2022-11-25 22:37:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2022-11-25 22:37:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147491, Invalid=457015, Unknown=0, NotChecked=0, Total=604506 [2022-11-25 22:37:21,946 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)