./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 2329fc70 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_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/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_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 14:05:49,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:05:49,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:05:49,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:05:49,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:05:49,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:05:49,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:05:49,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:05:49,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:05:49,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:05:49,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:05:49,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:05:49,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:05:49,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:05:49,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:05:49,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:05:49,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:05:49,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:05:49,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:05:49,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:05:49,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:05:49,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:05:49,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:05:49,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:05:49,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:05:49,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:05:49,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:05:49,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:05:49,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:05:49,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:05:49,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:05:49,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:05:49,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:05:49,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:05:49,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:05:49,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:05:49,756 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:05:49,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:05:49,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:05:49,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:05:49,758 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:05:49,758 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-12-14 14:05:49,773 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:05:49,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:05:49,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:05:49,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:05:49,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:05:49,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:05:49,774 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:05:49,774 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:05:49,774 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:05:49,774 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:05:49,775 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:05:49,775 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:05:49,775 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:05:49,775 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:05:49,775 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:05:49,775 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:05:49,776 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:05:49,776 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:05:49,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:05:49,777 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 14:05:49,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:05:49,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:05:49,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:05:49,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:05:49,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:05:49,778 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 14:05:49,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:05:49,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:05:49,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:05:49,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:05:49,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:05:49,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:05:49,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:05:49,779 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:05:49,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:05:49,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:05:49,780 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:05:49,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:05:49,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:05:49,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:05:49,780 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_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7e15211580ea4e53f751b22847dfea4720c9dc42574c861d991d991eb47919b [2022-12-14 14:05:49,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:05:49,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:05:49,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:05:49,980 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:05:49,980 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:05:49,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-12-14 14:05:52,583 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:05:52,698 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:05:52,698 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/sv-benchmarks/c/termination-crafted-lit/HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-12-14 14:05:52,703 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/data/bd1313ff8/60932054848e4a998c28d4bdcad99bc0/FLAGfd280f36f [2022-12-14 14:05:52,713 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/data/bd1313ff8/60932054848e4a998c28d4bdcad99bc0 [2022-12-14 14:05:52,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:05:52,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:05:52,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:05:52,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:05:52,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:05:52,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9aaddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52, skipping insertion in model container [2022-12-14 14:05:52,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:05:52,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:05:52,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:05:52,865 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:05:52,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:05:52,884 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:05:52,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52 WrapperNode [2022-12-14 14:05:52,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:05:52,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:05:52,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:05:52,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:05:52,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,904 INFO L138 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-12-14 14:05:52,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:05:52,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:05:52,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:05:52,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:05:52,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,917 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:05:52,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:05:52,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:05:52,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:05:52,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (1/1) ... [2022-12-14 14:05:52,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:05:52,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:05:52,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:05:52,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:05:52,985 INFO L130 BoogieDeclarations]: Found specification of procedure unlock [2022-12-14 14:05:52,985 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock [2022-12-14 14:05:52,985 INFO L130 BoogieDeclarations]: Found specification of procedure lock [2022-12-14 14:05:52,985 INFO L138 BoogieDeclarations]: Found implementation of procedure lock [2022-12-14 14:05:52,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:05:52,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:05:53,031 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:05:53,033 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:05:53,121 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:05:53,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:05:53,140 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 14:05:53,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:05:53 BoogieIcfgContainer [2022-12-14 14:05:53,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:05:53,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:05:53,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:05:53,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:05:53,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:05:52" (1/3) ... [2022-12-14 14:05:53,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5862ed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:05:53, skipping insertion in model container [2022-12-14 14:05:53,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:05:52" (2/3) ... [2022-12-14 14:05:53,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5862ed2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:05:53, skipping insertion in model container [2022-12-14 14:05:53,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:05:53" (3/3) ... [2022-12-14 14:05:53,150 INFO L112 eAbstractionObserver]: Analyzing ICFG HenzingerJhalaMajumdarSutre-POPL2002-LockingExample.c [2022-12-14 14:05:53,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:05:53,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-14 14:05:53,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:05:53,205 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;@40d93147, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:05:53,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 14:05:53,209 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) [2022-12-14 14:05:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 14:05:53,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:53,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:05:53,215 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)] === [2022-12-14 14:05:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:53,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1589653680, now seen corresponding path program 1 times [2022-12-14 14:05:53,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:53,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880128111] [2022-12-14 14:05:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:53,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:05:53,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:53,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880128111] [2022-12-14 14:05:53,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880128111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:53,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:53,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:05:53,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254238351] [2022-12-14 14:05:53,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:53,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:05:53,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:53,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:05:53,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:05:53,411 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) [2022-12-14 14:05:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:53,469 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-12-14 14:05:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:05:53,471 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 [2022-12-14 14:05:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:53,477 INFO L225 Difference]: With dead ends: 62 [2022-12-14 14:05:53,477 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 14:05:53,479 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 [2022-12-14 14:05:53,481 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 [2022-12-14 14:05:53,482 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] [2022-12-14 14:05:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 14:05:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2022-12-14 14:05:53,513 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) [2022-12-14 14:05:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-12-14 14:05:53,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 9 [2022-12-14 14:05:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:53,515 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-12-14 14:05:53,515 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) [2022-12-14 14:05:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-12-14 14:05:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 14:05:53,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:53,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:05:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:05:53,517 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)] === [2022-12-14 14:05:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2034623762, now seen corresponding path program 1 times [2022-12-14 14:05:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533588381] [2022-12-14 14:05:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:53,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:05:53,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:53,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533588381] [2022-12-14 14:05:53,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533588381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:53,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:53,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:05:53,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588942302] [2022-12-14 14:05:53,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:05:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:05:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:05:53,560 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) [2022-12-14 14:05:53,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:53,593 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2022-12-14 14:05:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:05:53,594 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 [2022-12-14 14:05:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:53,595 INFO L225 Difference]: With dead ends: 42 [2022-12-14 14:05:53,595 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 14:05:53,596 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 [2022-12-14 14:05:53,597 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 [2022-12-14 14:05:53,598 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] [2022-12-14 14:05:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 14:05:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-12-14 14:05:53,602 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) [2022-12-14 14:05:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-12-14 14:05:53,603 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2022-12-14 14:05:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:53,603 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-12-14 14:05:53,603 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) [2022-12-14 14:05:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-12-14 14:05:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 14:05:53,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:53,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:05:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:05:53,605 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)] === [2022-12-14 14:05:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash -555318825, now seen corresponding path program 1 times [2022-12-14 14:05:53,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:53,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238409157] [2022-12-14 14:05:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:05:53,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:53,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238409157] [2022-12-14 14:05:53,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238409157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:53,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:53,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:05:53,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472936514] [2022-12-14 14:05:53,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:53,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:05:53,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:53,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:05:53,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:05:53,657 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) [2022-12-14 14:05:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:53,681 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-12-14 14:05:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:05:53,682 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 [2022-12-14 14:05:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:53,682 INFO L225 Difference]: With dead ends: 26 [2022-12-14 14:05:53,682 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 14:05:53,683 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 [2022-12-14 14:05:53,683 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 [2022-12-14 14:05:53,684 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] [2022-12-14 14:05:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 14:05:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 14:05:53,687 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) [2022-12-14 14:05:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-12-14 14:05:53,688 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2022-12-14 14:05:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:53,688 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-12-14 14:05:53,688 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) [2022-12-14 14:05:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-12-14 14:05:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 14:05:53,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:53,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:05:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:05:53,690 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)] === [2022-12-14 14:05:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash -35014294, now seen corresponding path program 1 times [2022-12-14 14:05:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:53,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587358797] [2022-12-14 14:05:53,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:53,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:05:53,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:53,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587358797] [2022-12-14 14:05:53,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587358797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:53,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:53,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:05:53,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599346259] [2022-12-14 14:05:53,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:05:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:05:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:05:53,731 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) [2022-12-14 14:05:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:53,760 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-12-14 14:05:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:05:53,760 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 [2022-12-14 14:05:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:53,761 INFO L225 Difference]: With dead ends: 34 [2022-12-14 14:05:53,761 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 14:05:53,761 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 [2022-12-14 14:05:53,762 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 [2022-12-14 14:05:53,762 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] [2022-12-14 14:05:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 14:05:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-14 14:05:53,768 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) [2022-12-14 14:05:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-12-14 14:05:53,769 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2022-12-14 14:05:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:53,769 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-12-14 14:05:53,769 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) [2022-12-14 14:05:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-12-14 14:05:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 14:05:53,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:53,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 14:05:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:05:53,770 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)] === [2022-12-14 14:05:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash 194030849, now seen corresponding path program 1 times [2022-12-14 14:05:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:53,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451698167] [2022-12-14 14:05:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:05:53,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451698167] [2022-12-14 14:05:53,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451698167] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:05:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650569985] [2022-12-14 14:05:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:05:53,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:05:53,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:05:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:05:53,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:05:53,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:05:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:05:54,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650569985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:05:54,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [623643823] [2022-12-14 14:05:54,035 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:05:54,035 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:05:54,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:05:54,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:05:54,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:05:54,399 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-12-14 14:05:54,401 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-12-14 14:05:54,403 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:05:54,651 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 [2022-12-14 14:05:54,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:05:54,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:05:54,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 14:05:54,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007322234] [2022-12-14 14:05:54,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:05:54,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 14:05:54,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 14:05:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-12-14 14:05:54,654 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) [2022-12-14 14:05:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:54,744 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2022-12-14 14:05:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:05:54,744 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 [2022-12-14 14:05:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:54,745 INFO L225 Difference]: With dead ends: 58 [2022-12-14 14:05:54,745 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 14:05:54,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-12-14 14:05:54,747 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 59 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:54,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 117 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:05:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 14:05:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-14 14:05:54,754 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) [2022-12-14 14:05:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 76 transitions. [2022-12-14 14:05:54,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 76 transitions. Word has length 25 [2022-12-14 14:05:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:54,756 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 76 transitions. [2022-12-14 14:05:54,757 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) [2022-12-14 14:05:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 76 transitions. [2022-12-14 14:05:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 14:05:54,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:54,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2022-12-14 14:05:54,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:05:54,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:54,960 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)] === [2022-12-14 14:05:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:54,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1145997510, now seen corresponding path program 2 times [2022-12-14 14:05:54,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:54,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858345382] [2022-12-14 14:05:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:54,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:05:55,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:55,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858345382] [2022-12-14 14:05:55,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858345382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:05:55,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539382824] [2022-12-14 14:05:55,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:05:55,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:55,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:05:55,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:05:55,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:05:55,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 14:05:55,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:05:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 14:05:55,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:05:55,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:05:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:05:55,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539382824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:05:55,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288768220] [2022-12-14 14:05:55,486 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:05:55,486 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:05:55,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:05:55,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:05:55,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:05:55,754 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-12-14 14:05:55,756 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-12-14 14:05:55,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:05:56,074 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 [2022-12-14 14:05:56,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:05:56,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:05:56,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-14 14:05:56,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288428281] [2022-12-14 14:05:56,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:05:56,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 14:05:56,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 14:05:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 14:05:56,077 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) [2022-12-14 14:05:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:56,296 INFO L93 Difference]: Finished difference Result 106 states and 148 transitions. [2022-12-14 14:05:56,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 14:05:56,297 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 [2022-12-14 14:05:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:56,298 INFO L225 Difference]: With dead ends: 106 [2022-12-14 14:05:56,298 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 14:05:56,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=1538, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 14:05:56,300 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:56,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 201 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:05:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 14:05:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-12-14 14:05:56,312 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) [2022-12-14 14:05:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 142 transitions. [2022-12-14 14:05:56,314 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 142 transitions. Word has length 61 [2022-12-14 14:05:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:56,315 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 142 transitions. [2022-12-14 14:05:56,315 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) [2022-12-14 14:05:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 142 transitions. [2022-12-14 14:05:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 14:05:56,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:56,318 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1] [2022-12-14 14:05:56,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:05:56,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:56,519 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)] === [2022-12-14 14:05:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1931756752, now seen corresponding path program 3 times [2022-12-14 14:05:56,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:56,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975028923] [2022-12-14 14:05:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:56,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:05:57,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:57,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975028923] [2022-12-14 14:05:57,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975028923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:05:57,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297252495] [2022-12-14 14:05:57,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:05:57,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:57,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:05:57,081 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:05:57,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:05:57,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:05:57,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:05:57,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 14:05:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:05:57,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:05:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 14:05:57,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297252495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:05:57,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122052633] [2022-12-14 14:05:57,668 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:05:57,668 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:05:57,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:05:57,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:05:57,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:05:57,841 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-12-14 14:05:57,843 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-12-14 14:05:57,844 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:05:58,209 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 [2022-12-14 14:05:58,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:05:58,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:05:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2022-12-14 14:05:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427505593] [2022-12-14 14:05:58,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:05:58,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 14:05:58,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 14:05:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 14:05:58,212 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) [2022-12-14 14:05:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:58,733 INFO L93 Difference]: Finished difference Result 202 states and 286 transitions. [2022-12-14 14:05:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 14:05:58,733 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 [2022-12-14 14:05:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:58,735 INFO L225 Difference]: With dead ends: 202 [2022-12-14 14:05:58,735 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 14:05:58,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 353 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1392, Invalid=4928, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 14:05:58,738 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 170 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:58,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 349 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:05:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 14:05:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-12-14 14:05:58,755 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) [2022-12-14 14:05:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 274 transitions. [2022-12-14 14:05:58,757 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 274 transitions. Word has length 133 [2022-12-14 14:05:58,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:58,758 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 274 transitions. [2022-12-14 14:05:58,758 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) [2022-12-14 14:05:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 274 transitions. [2022-12-14 14:05:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-12-14 14:05:58,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:58,764 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1] [2022-12-14 14:05:58,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 14:05:58,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 14:05:58,965 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)] === [2022-12-14 14:05:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1702179100, now seen corresponding path program 4 times [2022-12-14 14:05:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:58,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411629222] [2022-12-14 14:05:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:58,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:06:00,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411629222] [2022-12-14 14:06:00,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411629222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:00,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896402862] [2022-12-14 14:06:00,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:06:00,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:00,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:00,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:00,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:06:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:00,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 14:06:00,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:06:00,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:06:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3014 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-12-14 14:06:01,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896402862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:06:01,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709603500] [2022-12-14 14:06:01,999 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:06:01,999 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:06:01,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:06:01,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:06:02,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:06:02,143 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-12-14 14:06:02,144 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-12-14 14:06:02,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:06:02,949 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 [2022-12-14 14:06:02,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:06:02,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:06:02,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 93 [2022-12-14 14:06:02,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005327592] [2022-12-14 14:06:02,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:06:02,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-12-14 14:06:02,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:02,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-12-14 14:06:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2339, Invalid=8791, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 14:06:02,954 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) [2022-12-14 14:06:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:04,323 INFO L93 Difference]: Finished difference Result 394 states and 562 transitions. [2022-12-14 14:06:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-14 14:06:04,323 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 [2022-12-14 14:06:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:04,325 INFO L225 Difference]: With dead ends: 394 [2022-12-14 14:06:04,325 INFO L226 Difference]: Without dead ends: 393 [2022-12-14 14:06:04,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 749 SyntacticMatches, 23 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9018 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5628, Invalid=17324, Unknown=0, NotChecked=0, Total=22952 [2022-12-14 14:06:04,329 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 671 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:04,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1502 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:06:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-14 14:06:04,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2022-12-14 14:06:04,343 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) [2022-12-14 14:06:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 538 transitions. [2022-12-14 14:06:04,345 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 538 transitions. Word has length 277 [2022-12-14 14:06:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:04,346 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 538 transitions. [2022-12-14 14:06:04,346 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) [2022-12-14 14:06:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 538 transitions. [2022-12-14 14:06:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-12-14 14:06:04,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:04,356 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 1, 1, 1] [2022-12-14 14:06:04,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:06:04,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:04,556 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)] === [2022-12-14 14:06:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1109644532, now seen corresponding path program 5 times [2022-12-14 14:06:04,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:04,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353525351] [2022-12-14 14:06:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 14:06:09,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:09,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353525351] [2022-12-14 14:06:09,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353525351] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:09,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330613416] [2022-12-14 14:06:09,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:06:09,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:09,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:09,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:09,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:06:10,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-12-14 14:06:10,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:06:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 14:06:10,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 14:06:10,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:06:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12926 backedges. 0 proven. 8602 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-12-14 14:06:14,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330613416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:06:14,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772672660] [2022-12-14 14:06:14,741 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:06:14,741 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:06:14,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:06:14,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:06:14,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:06:14,895 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-12-14 14:06:14,896 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-12-14 14:06:14,897 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:06:17,169 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 [2022-12-14 14:06:17,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:06:17,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:06:17,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 189 [2022-12-14 14:06:17,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143855141] [2022-12-14 14:06:17,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:06:17,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-12-14 14:06:17,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:06:17,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-12-14 14:06:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9251, Invalid=31351, Unknown=0, NotChecked=0, Total=40602 [2022-12-14 14:06:17,178 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) [2022-12-14 14:06:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:22,529 INFO L93 Difference]: Finished difference Result 778 states and 1114 transitions. [2022-12-14 14:06:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-12-14 14:06:22,530 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 [2022-12-14 14:06:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:22,535 INFO L225 Difference]: With dead ends: 778 [2022-12-14 14:06:22,535 INFO L226 Difference]: Without dead ends: 777 [2022-12-14 14:06:22,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1882 GetRequests, 1541 SyntacticMatches, 47 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34242 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=22740, Invalid=64580, Unknown=0, NotChecked=0, Total=87320 [2022-12-14 14:06:22,541 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 1121 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:22,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1491 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 14:06:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-12-14 14:06:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 777. [2022-12-14 14:06:22,559 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) [2022-12-14 14:06:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1066 transitions. [2022-12-14 14:06:22,562 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1066 transitions. Word has length 565 [2022-12-14 14:06:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:22,563 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 1066 transitions. [2022-12-14 14:06:22,564 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) [2022-12-14 14:06:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1066 transitions. [2022-12-14 14:06:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1142 [2022-12-14 14:06:22,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:22,573 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 95, 95, 94, 94, 1, 1, 1] [2022-12-14 14:06:22,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 14:06:22,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:22,775 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)] === [2022-12-14 14:06:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:22,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1934623580, now seen corresponding path program 6 times [2022-12-14 14:06:22,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:22,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251362856] [2022-12-14 14:06:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:22,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-12-14 14:06:47,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:47,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251362856] [2022-12-14 14:06:47,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251362856] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:47,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565405146] [2022-12-14 14:06:47,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:06:47,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:47,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:47,843 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:47,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:06:51,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:06:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:06:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2479 conjuncts, 191 conjunts are in the unsatisfiable core [2022-12-14 14:06:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-12-14 14:06:52,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:07:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 53486 backedges. 0 proven. 35626 refuted. 0 times theorem prover too weak. 17860 trivial. 0 not checked. [2022-12-14 14:07:10,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565405146] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:07:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964457415] [2022-12-14 14:07:10,283 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:07:10,283 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:07:10,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:07:10,284 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:07:10,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:07:10,396 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-12-14 14:07:10,397 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-12-14 14:07:10,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:07:18,944 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 [2022-12-14 14:07:18,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:07:18,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:07:18,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 381 [2022-12-14 14:07:18,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635686694] [2022-12-14 14:07:18,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:07:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 382 states [2022-12-14 14:07:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:07:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 382 interpolants. [2022-12-14 14:07:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36899, Invalid=117943, Unknown=0, NotChecked=0, Total=154842 [2022-12-14 14:07:18,981 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) [2022-12-14 14:07:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:46,885 INFO L93 Difference]: Finished difference Result 1546 states and 2218 transitions. [2022-12-14 14:07:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-12-14 14:07:46,886 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 [2022-12-14 14:07:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:46,891 INFO L225 Difference]: With dead ends: 1546 [2022-12-14 14:07:46,891 INFO L226 Difference]: Without dead ends: 1545 [2022-12-14 14:07:46,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3802 GetRequests, 3125 SyntacticMatches, 95 SemanticMatches, 582 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133074 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=91524, Invalid=248948, Unknown=0, NotChecked=0, Total=340472 [2022-12-14 14:07:46,907 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 2702 mSDsluCounter, 2438 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 2977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:46,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 2842 Invalid, 2977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2964 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 14:07:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-12-14 14:07:46,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1545. [2022-12-14 14:07:46,939 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) [2022-12-14 14:07:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2122 transitions. [2022-12-14 14:07:46,943 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2122 transitions. Word has length 1141 [2022-12-14 14:07:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:46,945 INFO L495 AbstractCegarLoop]: Abstraction has 1545 states and 2122 transitions. [2022-12-14 14:07:46,946 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) [2022-12-14 14:07:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2122 transitions. [2022-12-14 14:07:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2294 [2022-12-14 14:07:46,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:46,975 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 191, 191, 191, 191, 191, 191, 191, 190, 190, 1, 1, 1] [2022-12-14 14:07:46,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:07:47,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 14:07:47,177 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)] === [2022-12-14 14:07:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2138846204, now seen corresponding path program 7 times [2022-12-14 14:07:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:07:47,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036885180] [2022-12-14 14:07:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:07:47,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:07:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-12-14 14:10:32,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:32,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036885180] [2022-12-14 14:10:32,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036885180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337057925] [2022-12-14 14:10:32,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:10:32,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:32,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:32,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:10:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 4975 conjuncts, 383 conjunts are in the unsatisfiable core [2022-12-14 14:10:32,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-12-14 14:10:34,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:11:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 217550 backedges. 0 proven. 144970 refuted. 0 times theorem prover too weak. 72580 trivial. 0 not checked. [2022-12-14 14:11:44,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337057925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:11:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870868304] [2022-12-14 14:11:44,134 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:11:44,134 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:11:44,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:11:44,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:11:44,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:11:44,264 INFO L197 IcfgInterpreter]: Interpreting procedure lock with input of size 3 for LOIs [2022-12-14 14:11:44,265 INFO L197 IcfgInterpreter]: Interpreting procedure unlock with input of size 3 for LOIs [2022-12-14 14:11:44,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:12:13,482 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 [2022-12-14 14:12:13,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:12:13,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:12:13,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [383, 383, 383] total 765 [2022-12-14 14:12:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998891999] [2022-12-14 14:12:13,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:12:13,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 766 states [2022-12-14 14:12:13,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:12:13,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 766 interpolants. [2022-12-14 14:12:13,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147491, Invalid=457015, Unknown=0, NotChecked=0, Total=604506 [2022-12-14 14:12:13,536 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) [2022-12-14 14:15:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:15:46,091 INFO L93 Difference]: Finished difference Result 3082 states and 4426 transitions. [2022-12-14 14:15:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 766 states. [2022-12-14 14:15:46,093 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 2293 [2022-12-14 14:15:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:15:46,102 INFO L225 Difference]: With dead ends: 3082 [2022-12-14 14:15:46,102 INFO L226 Difference]: Without dead ends: 3081 [2022-12-14 14:15:46,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7642 GetRequests, 6293 SyntacticMatches, 191 SemanticMatches, 1158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524274 ImplicationChecksByTransitivity, 178.6s TimeCoverageRelationStatistics Valid=367332, Invalid=977108, Unknown=0, NotChecked=0, Total=1344440 [2022-12-14 14:15:46,183 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 5393 mSDsluCounter, 5529 mSDsCounter, 0 mSdLazyCounter, 7287 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5395 SdHoareTripleChecker+Valid, 6317 SdHoareTripleChecker+Invalid, 7294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:15:46,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5395 Valid, 6317 Invalid, 7294 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 7287 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 14:15:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2022-12-14 14:15:46,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 3081. [2022-12-14 14:15:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 2310 states have (on average 1.1679653679653679) internal successors, (2698), 2311 states have internal predecessors, (2698), 768 states have call successors, (768), 2 states have call predecessors, (768), 2 states have return successors, (768), 768 states have call predecessors, (768), 768 states have call successors, (768) [2022-12-14 14:15:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4234 transitions. [2022-12-14 14:15:46,252 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4234 transitions. Word has length 2293 [2022-12-14 14:15:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:15:46,255 INFO L495 AbstractCegarLoop]: Abstraction has 3081 states and 4234 transitions. [2022-12-14 14:15:46,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-12-14 14:15:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4234 transitions. [2022-12-14 14:15:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4598 [2022-12-14 14:15:46,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:15:46,370 INFO L195 NwaCegarLoop]: trace histogram [383, 383, 383, 383, 383, 383, 383, 383, 383, 383, 382, 382, 1, 1, 1] [2022-12-14 14:15:46,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:15:46,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b152091-cd75-4694-9b9b-a1e5ff6afaff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 14:15:46,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2022-12-14 14:15:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:15:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1290179900, now seen corresponding path program 8 times [2022-12-14 14:15:46,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:15:46,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350373170] [2022-12-14 14:15:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:15:46,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:15:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat