./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:47:38,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:47:38,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:47:38,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:47:38,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:47:38,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:47:38,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:47:38,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:47:38,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:47:38,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:47:38,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:47:38,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:47:38,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:47:38,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:47:38,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:47:38,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:47:38,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:47:38,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:47:38,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:47:38,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:47:38,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:47:38,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:47:38,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:47:38,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:47:38,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:47:38,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:47:38,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:47:38,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:47:38,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:47:38,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:47:38,848 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:47:38,849 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:47:38,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:47:38,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:47:38,852 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:47:38,852 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:47:38,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:47:38,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:47:38,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:47:38,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:47:38,855 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:47:38,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-25 23:47:38,905 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:47:38,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:47:38,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:47:38,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:47:38,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:47:38,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:47:38,908 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:47:38,908 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:47:38,908 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:47:38,908 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:47:38,909 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:47:38,910 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:47:38,910 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:47:38,910 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:47:38,910 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:47:38,910 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:47:38,911 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:47:38,911 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:47:38,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:47:38,912 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:47:38,912 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:47:38,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:47:38,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:47:38,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:47:38,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:47:38,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:47:38,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:47:38,914 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 23:47:38,914 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:47:38,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:47:38,915 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:47:38,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:47:38,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:47:38,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:47:38,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:47:38,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:47:38,917 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:47:38,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:47:38,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:47:38,918 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:47:38,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:47:38,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:47:38,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:47:38,919 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_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739dc04b5c5aa67083a96cc98ccb84e17de2a97ca235c28aa84e8c99a10b0a9e [2022-11-25 23:47:39,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:47:39,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:47:39,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:47:39,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:47:39,268 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:47:39,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2022-11-25 23:47:42,311 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:47:42,556 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:47:42,557 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2022-11-25 23:47:42,564 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/data/c2edc8b7d/2a1f5dbfc52f4bc5a1651e84f641791b/FLAGec3f7053e [2022-11-25 23:47:42,579 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/data/c2edc8b7d/2a1f5dbfc52f4bc5a1651e84f641791b [2022-11-25 23:47:42,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:47:42,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:47:42,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:47:42,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:47:42,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:47:42,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520dcdcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42, skipping insertion in model container [2022-11-25 23:47:42,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:47:42,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:47:42,797 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,798 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,803 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,805 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,816 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2507,2520] [2022-11-25 23:47:42,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:47:42,828 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:47:42,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,844 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,844 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,845 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:47:42,846 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:47:42,852 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c[2507,2520] [2022-11-25 23:47:42,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:47:42,868 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:47:42,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42 WrapperNode [2022-11-25 23:47:42,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:47:42,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:47:42,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:47:42,870 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:47:42,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,886 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,912 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 128 [2022-11-25 23:47:42,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:47:42,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:47:42,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:47:42,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:47:42,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:47:42,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:47:42,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:47:42,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:47:42,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (1/1) ... [2022-11-25 23:47:42,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:47:42,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:42,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:47:43,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:47:43,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:47:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:47:43,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:47:43,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:47:43,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:47:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:47:43,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:47:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 23:47:43,048 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 23:47:43,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:47:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:47:43,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:47:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 23:47:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 23:47:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:47:43,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:47:43,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:47:43,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:47:43,052 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:47:43,225 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:47:43,227 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:47:43,582 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:47:43,692 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:47:43,698 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 23:47:43,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:47:43 BoogieIcfgContainer [2022-11-25 23:47:43,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:47:43,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:47:43,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:47:43,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:47:43,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:47:42" (1/3) ... [2022-11-25 23:47:43,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454daf16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:47:43, skipping insertion in model container [2022-11-25 23:47:43,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:47:42" (2/3) ... [2022-11-25 23:47:43,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454daf16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:47:43, skipping insertion in model container [2022-11-25 23:47:43,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:47:43" (3/3) ... [2022-11-25 23:47:43,715 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2022-11-25 23:47:43,725 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 23:47:43,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:47:43,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-25 23:47:43,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:47:43,886 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 23:47:43,936 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:47:43,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 151 transitions, 334 flow [2022-11-25 23:47:43,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 151 transitions, 334 flow [2022-11-25 23:47:43,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 151 transitions, 334 flow [2022-11-25 23:47:44,081 INFO L130 PetriNetUnfolder]: 9/147 cut-off events. [2022-11-25 23:47:44,081 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 23:47:44,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 147 events. 9/147 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-11-25 23:47:44,099 INFO L119 LiptonReduction]: Number of co-enabled transitions 5184 [2022-11-25 23:47:50,064 INFO L134 LiptonReduction]: Checked pairs total: 6541 [2022-11-25 23:47:50,064 INFO L136 LiptonReduction]: Total number of compositions: 138 [2022-11-25 23:47:50,073 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 49 transitions, 130 flow [2022-11-25 23:47:50,451 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:50,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:47:50,485 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;@e31608a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:47:50,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-25 23:47:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:47:50,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:50,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:47:50,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:50,542 INFO L85 PathProgramCache]: Analyzing trace with hash 20142641, now seen corresponding path program 1 times [2022-11-25 23:47:50,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:50,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595506915] [2022-11-25 23:47:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:50,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:50,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595506915] [2022-11-25 23:47:50,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595506915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:50,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:50,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:47:50,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203223938] [2022-11-25 23:47:50,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:50,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:50,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:50,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:50,936 INFO L87 Difference]: Start difference. First operand has 6392 states, 5768 states have (on average 4.805131761442441) internal successors, (27716), 6391 states have internal predecessors, (27716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:51,359 INFO L93 Difference]: Finished difference Result 7808 states and 33616 transitions. [2022-11-25 23:47:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:51,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 23:47:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:51,480 INFO L225 Difference]: With dead ends: 7808 [2022-11-25 23:47:51,481 INFO L226 Difference]: Without dead ends: 7808 [2022-11-25 23:47:51,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:51,485 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:51,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2022-11-25 23:47:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 5410. [2022-11-25 23:47:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5410 states, 5011 states have (on average 5.033526242267013) internal successors, (25223), 5409 states have internal predecessors, (25223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5410 states to 5410 states and 25223 transitions. [2022-11-25 23:47:51,965 INFO L78 Accepts]: Start accepts. Automaton has 5410 states and 25223 transitions. Word has length 4 [2022-11-25 23:47:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:51,966 INFO L495 AbstractCegarLoop]: Abstraction has 5410 states and 25223 transitions. [2022-11-25 23:47:51,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5410 states and 25223 transitions. [2022-11-25 23:47:51,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-25 23:47:51,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:51,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-25 23:47:51,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:47:51,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:51,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash 20142569, now seen corresponding path program 1 times [2022-11-25 23:47:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:51,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343696248] [2022-11-25 23:47:51,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:51,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:52,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:52,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343696248] [2022-11-25 23:47:52,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343696248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:52,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:52,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:47:52,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12717330] [2022-11-25 23:47:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:52,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:52,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:52,047 INFO L87 Difference]: Start difference. First operand 5410 states and 25223 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:52,254 INFO L93 Difference]: Finished difference Result 5452 states and 22976 transitions. [2022-11-25 23:47:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:52,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-25 23:47:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:52,301 INFO L225 Difference]: With dead ends: 5452 [2022-11-25 23:47:52,301 INFO L226 Difference]: Without dead ends: 5444 [2022-11-25 23:47:52,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:52,302 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:52,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 7 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2022-11-25 23:47:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 5172. [2022-11-25 23:47:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5172 states, 4773 states have (on average 4.650953278860255) internal successors, (22199), 5171 states have internal predecessors, (22199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 22199 transitions. [2022-11-25 23:47:52,606 INFO L78 Accepts]: Start accepts. Automaton has 5172 states and 22199 transitions. Word has length 4 [2022-11-25 23:47:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:52,607 INFO L495 AbstractCegarLoop]: Abstraction has 5172 states and 22199 transitions. [2022-11-25 23:47:52,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5172 states and 22199 transitions. [2022-11-25 23:47:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:47:52,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:52,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:47:52,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:47:52,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:52,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash 624422913, now seen corresponding path program 1 times [2022-11-25 23:47:52,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:52,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472860837] [2022-11-25 23:47:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:52,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:52,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472860837] [2022-11-25 23:47:52,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472860837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:52,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763520463] [2022-11-25 23:47:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:52,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:52,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:52,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:52,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:47:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:47:52,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:52,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:52,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763520463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:52,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672168831] [2022-11-25 23:47:52,968 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:47:52,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:47:52,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:47:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544048963] [2022-11-25 23:47:52,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:47:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:47:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:47:52,980 INFO L87 Difference]: Start difference. First operand 5172 states and 22199 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:53,594 INFO L93 Difference]: Finished difference Result 14444 states and 63275 transitions. [2022-11-25 23:47:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:47:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:47:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:53,924 INFO L225 Difference]: With dead ends: 14444 [2022-11-25 23:47:53,927 INFO L226 Difference]: Without dead ends: 14444 [2022-11-25 23:47:53,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:47:53,928 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 227 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:53,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 28 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:47:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14444 states. [2022-11-25 23:47:54,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14444 to 6978. [2022-11-25 23:47:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6978 states, 6579 states have (on average 5.677002583979328) internal successors, (37349), 6977 states have internal predecessors, (37349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6978 states to 6978 states and 37349 transitions. [2022-11-25 23:47:54,505 INFO L78 Accepts]: Start accepts. Automaton has 6978 states and 37349 transitions. Word has length 5 [2022-11-25 23:47:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:54,505 INFO L495 AbstractCegarLoop]: Abstraction has 6978 states and 37349 transitions. [2022-11-25 23:47:54,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6978 states and 37349 transitions. [2022-11-25 23:47:54,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:47:54,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:54,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:47:54,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:47:54,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:54,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash 624422841, now seen corresponding path program 1 times [2022-11-25 23:47:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579177611] [2022-11-25 23:47:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:54,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:54,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:54,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:54,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579177611] [2022-11-25 23:47:54,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579177611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:54,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:54,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:47:54,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084843146] [2022-11-25 23:47:54,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:54,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:54,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:54,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:54,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:54,797 INFO L87 Difference]: Start difference. First operand 6978 states and 37349 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:54,925 INFO L93 Difference]: Finished difference Result 6376 states and 32899 transitions. [2022-11-25 23:47:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:54,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:47:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:55,071 INFO L225 Difference]: With dead ends: 6376 [2022-11-25 23:47:55,072 INFO L226 Difference]: Without dead ends: 6376 [2022-11-25 23:47:55,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:55,087 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:55,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 4 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2022-11-25 23:47:55,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 6376. [2022-11-25 23:47:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6376 states, 6057 states have (on average 5.43156678223543) internal successors, (32899), 6375 states have internal predecessors, (32899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:55,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6376 states to 6376 states and 32899 transitions. [2022-11-25 23:47:55,511 INFO L78 Accepts]: Start accepts. Automaton has 6376 states and 32899 transitions. Word has length 5 [2022-11-25 23:47:55,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:55,511 INFO L495 AbstractCegarLoop]: Abstraction has 6376 states and 32899 transitions. [2022-11-25 23:47:55,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:55,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6376 states and 32899 transitions. [2022-11-25 23:47:55,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:47:55,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:55,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:47:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:47:55,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash 624422842, now seen corresponding path program 1 times [2022-11-25 23:47:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:55,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140073986] [2022-11-25 23:47:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:55,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:55,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:55,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140073986] [2022-11-25 23:47:55,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140073986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:55,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103446767] [2022-11-25 23:47:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:55,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:55,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:55,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:47:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:47:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:55,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:55,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103446767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:55,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888434862] [2022-11-25 23:47:55,769 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:47:55,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:47:55,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 23:47:55,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718300726] [2022-11-25 23:47:55,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:55,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:47:55,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:55,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:47:55,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:47:55,773 INFO L87 Difference]: Start difference. First operand 6376 states and 32899 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:56,289 INFO L93 Difference]: Finished difference Result 17134 states and 78339 transitions. [2022-11-25 23:47:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:47:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:47:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:56,538 INFO L225 Difference]: With dead ends: 17134 [2022-11-25 23:47:56,542 INFO L226 Difference]: Without dead ends: 17130 [2022-11-25 23:47:56,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:47:56,543 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 232 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:56,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 19 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:47:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17130 states. [2022-11-25 23:47:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17130 to 11318. [2022-11-25 23:47:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11318 states, 10999 states have (on average 5.586598781707428) internal successors, (61447), 11317 states have internal predecessors, (61447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11318 states to 11318 states and 61447 transitions. [2022-11-25 23:47:57,218 INFO L78 Accepts]: Start accepts. Automaton has 11318 states and 61447 transitions. Word has length 5 [2022-11-25 23:47:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:57,218 INFO L495 AbstractCegarLoop]: Abstraction has 11318 states and 61447 transitions. [2022-11-25 23:47:57,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 11318 states and 61447 transitions. [2022-11-25 23:47:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:47:57,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:57,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:47:57,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:57,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:57,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:57,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 624422895, now seen corresponding path program 1 times [2022-11-25 23:47:57,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:57,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084478052] [2022-11-25 23:47:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:57,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:57,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084478052] [2022-11-25 23:47:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084478052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:57,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:57,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:47:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098881796] [2022-11-25 23:47:57,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:57,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:57,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:57,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:57,496 INFO L87 Difference]: Start difference. First operand 11318 states and 61447 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:57,683 INFO L93 Difference]: Finished difference Result 10314 states and 51535 transitions. [2022-11-25 23:47:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 23:47:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:57,993 INFO L225 Difference]: With dead ends: 10314 [2022-11-25 23:47:57,993 INFO L226 Difference]: Without dead ends: 10314 [2022-11-25 23:47:57,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:57,995 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:57,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2022-11-25 23:47:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 10314. [2022-11-25 23:47:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 10075 states have (on average 5.115136476426799) internal successors, (51535), 10313 states have internal predecessors, (51535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 51535 transitions. [2022-11-25 23:47:58,579 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 51535 transitions. Word has length 5 [2022-11-25 23:47:58,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:58,579 INFO L495 AbstractCegarLoop]: Abstraction has 10314 states and 51535 transitions. [2022-11-25 23:47:58,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:58,580 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 51535 transitions. [2022-11-25 23:47:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:47:58,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:58,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:47:58,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 23:47:58,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:58,582 INFO L85 PathProgramCache]: Analyzing trace with hash 652313000, now seen corresponding path program 1 times [2022-11-25 23:47:58,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:58,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395171309] [2022-11-25 23:47:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:58,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:58,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:58,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395171309] [2022-11-25 23:47:58,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395171309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:47:58,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:47:58,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:47:58,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448578043] [2022-11-25 23:47:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:47:58,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:47:58,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:47:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:47:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:58,654 INFO L87 Difference]: Start difference. First operand 10314 states and 51535 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:59,037 INFO L93 Difference]: Finished difference Result 12402 states and 60637 transitions. [2022-11-25 23:47:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:47:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:47:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:59,113 INFO L225 Difference]: With dead ends: 12402 [2022-11-25 23:47:59,113 INFO L226 Difference]: Without dead ends: 12394 [2022-11-25 23:47:59,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:47:59,114 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:59,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 10 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:47:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12394 states. [2022-11-25 23:47:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12394 to 10958. [2022-11-25 23:47:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10958 states, 10719 states have (on average 5.18639798488665) internal successors, (55593), 10957 states have internal predecessors, (55593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10958 states to 10958 states and 55593 transitions. [2022-11-25 23:47:59,865 INFO L78 Accepts]: Start accepts. Automaton has 10958 states and 55593 transitions. Word has length 8 [2022-11-25 23:47:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:59,866 INFO L495 AbstractCegarLoop]: Abstraction has 10958 states and 55593 transitions. [2022-11-25 23:47:59,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 10958 states and 55593 transitions. [2022-11-25 23:47:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:47:59,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:59,869 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 23:47:59,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:47:59,870 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:47:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:59,871 INFO L85 PathProgramCache]: Analyzing trace with hash 680676913, now seen corresponding path program 2 times [2022-11-25 23:47:59,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:47:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233373173] [2022-11-25 23:47:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:47:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:47:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:47:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:59,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:47:59,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233373173] [2022-11-25 23:47:59,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233373173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:47:59,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498867536] [2022-11-25 23:47:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:47:59,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:59,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:59,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:59,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:48:00,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:48:00,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:00,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:48:00,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:48:00,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:48:00,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498867536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:00,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:48:00,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2022-11-25 23:48:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180118397] [2022-11-25 23:48:00,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:00,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:00,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:00,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:48:00,095 INFO L87 Difference]: Start difference. First operand 10958 states and 55593 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:00,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:00,256 INFO L93 Difference]: Finished difference Result 8560 states and 42153 transitions. [2022-11-25 23:48:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:00,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:48:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:00,318 INFO L225 Difference]: With dead ends: 8560 [2022-11-25 23:48:00,319 INFO L226 Difference]: Without dead ends: 8560 [2022-11-25 23:48:00,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:48:00,320 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:00,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 4 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:48:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8560 states. [2022-11-25 23:48:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8560 to 5980. [2022-11-25 23:48:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 5853 states have (on average 4.930975568084743) internal successors, (28861), 5979 states have internal predecessors, (28861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 28861 transitions. [2022-11-25 23:48:00,636 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 28861 transitions. Word has length 8 [2022-11-25 23:48:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:00,636 INFO L495 AbstractCegarLoop]: Abstraction has 5980 states and 28861 transitions. [2022-11-25 23:48:00,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:00,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 28861 transitions. [2022-11-25 23:48:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:48:00,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:00,638 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-25 23:48:00,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:48:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:00,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 680676842, now seen corresponding path program 2 times [2022-11-25 23:48:00,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:00,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547806291] [2022-11-25 23:48:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:00,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:00,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547806291] [2022-11-25 23:48:00,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547806291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:00,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451901530] [2022-11-25 23:48:00,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:48:00,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:00,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:00,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:00,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:48:01,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:48:01,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:48:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:01,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:01,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451901530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1948243463] [2022-11-25 23:48:01,132 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:01,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:01,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 23:48:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868847353] [2022-11-25 23:48:01,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:48:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:48:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:48:01,136 INFO L87 Difference]: Start difference. First operand 5980 states and 28861 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:02,057 INFO L93 Difference]: Finished difference Result 21620 states and 97185 transitions. [2022-11-25 23:48:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:48:02,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:48:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:02,195 INFO L225 Difference]: With dead ends: 21620 [2022-11-25 23:48:02,195 INFO L226 Difference]: Without dead ends: 21612 [2022-11-25 23:48:02,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:48:02,196 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 504 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:02,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 34 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:48:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21612 states. [2022-11-25 23:48:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21612 to 10516. [2022-11-25 23:48:02,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10516 states, 10389 states have (on average 5.121089614014823) internal successors, (53203), 10515 states have internal predecessors, (53203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10516 states to 10516 states and 53203 transitions. [2022-11-25 23:48:02,919 INFO L78 Accepts]: Start accepts. Automaton has 10516 states and 53203 transitions. Word has length 8 [2022-11-25 23:48:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:02,920 INFO L495 AbstractCegarLoop]: Abstraction has 10516 states and 53203 transitions. [2022-11-25 23:48:02,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 10516 states and 53203 transitions. [2022-11-25 23:48:02,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:48:02,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:02,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:02,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:03,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:03,137 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:03,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1380241293, now seen corresponding path program 1 times [2022-11-25 23:48:03,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:03,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039580800] [2022-11-25 23:48:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:03,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:03,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:03,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039580800] [2022-11-25 23:48:03,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039580800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:03,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:03,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:03,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081739437] [2022-11-25 23:48:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:03,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:03,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:03,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:03,182 INFO L87 Difference]: Start difference. First operand 10516 states and 53203 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:03,414 INFO L93 Difference]: Finished difference Result 17360 states and 88062 transitions. [2022-11-25 23:48:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:48:03,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:03,499 INFO L225 Difference]: With dead ends: 17360 [2022-11-25 23:48:03,499 INFO L226 Difference]: Without dead ends: 17360 [2022-11-25 23:48:03,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:03,500 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:03,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 10 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17360 states. [2022-11-25 23:48:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17360 to 12230. [2022-11-25 23:48:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12230 states, 12103 states have (on average 5.5418491283152935) internal successors, (67073), 12229 states have internal predecessors, (67073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:04,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12230 states to 12230 states and 67073 transitions. [2022-11-25 23:48:04,313 INFO L78 Accepts]: Start accepts. Automaton has 12230 states and 67073 transitions. Word has length 8 [2022-11-25 23:48:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:04,314 INFO L495 AbstractCegarLoop]: Abstraction has 12230 states and 67073 transitions. [2022-11-25 23:48:04,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 12230 states and 67073 transitions. [2022-11-25 23:48:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:48:04,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:04,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:04,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 23:48:04,315 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:04,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:04,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1380241238, now seen corresponding path program 1 times [2022-11-25 23:48:04,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:04,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762177369] [2022-11-25 23:48:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:04,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:04,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762177369] [2022-11-25 23:48:04,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762177369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:04,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:04,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:48:04,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627676801] [2022-11-25 23:48:04,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:04,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:04,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:04,375 INFO L87 Difference]: Start difference. First operand 12230 states and 67073 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:04,823 INFO L93 Difference]: Finished difference Result 11658 states and 58101 transitions. [2022-11-25 23:48:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:04,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:48:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:04,891 INFO L225 Difference]: With dead ends: 11658 [2022-11-25 23:48:04,891 INFO L226 Difference]: Without dead ends: 11600 [2022-11-25 23:48:04,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:04,892 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:04,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 7 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2022-11-25 23:48:05,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 11370. [2022-11-25 23:48:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 11243 states have (on average 5.072578493284711) internal successors, (57031), 11369 states have internal predecessors, (57031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 57031 transitions. [2022-11-25 23:48:05,306 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 57031 transitions. Word has length 8 [2022-11-25 23:48:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:05,306 INFO L495 AbstractCegarLoop]: Abstraction has 11370 states and 57031 transitions. [2022-11-25 23:48:05,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 57031 transitions. [2022-11-25 23:48:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:48:05,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:05,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:05,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 23:48:05,309 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash -162191214, now seen corresponding path program 1 times [2022-11-25 23:48:05,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:05,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898238386] [2022-11-25 23:48:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:05,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:05,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:05,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898238386] [2022-11-25 23:48:05,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898238386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:05,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:05,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768849705] [2022-11-25 23:48:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:05,373 INFO L87 Difference]: Start difference. First operand 11370 states and 57031 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:05,547 INFO L93 Difference]: Finished difference Result 9656 states and 48281 transitions. [2022-11-25 23:48:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:48:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:05,594 INFO L225 Difference]: With dead ends: 9656 [2022-11-25 23:48:05,594 INFO L226 Difference]: Without dead ends: 9656 [2022-11-25 23:48:05,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:05,595 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:05,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 10 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9656 states. [2022-11-25 23:48:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9656 to 9656. [2022-11-25 23:48:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9656 states, 9561 states have (on average 5.049785587281665) internal successors, (48281), 9655 states have internal predecessors, (48281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9656 states to 9656 states and 48281 transitions. [2022-11-25 23:48:06,226 INFO L78 Accepts]: Start accepts. Automaton has 9656 states and 48281 transitions. Word has length 9 [2022-11-25 23:48:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:06,226 INFO L495 AbstractCegarLoop]: Abstraction has 9656 states and 48281 transitions. [2022-11-25 23:48:06,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 9656 states and 48281 transitions. [2022-11-25 23:48:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:48:06,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:06,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:06,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 23:48:06,228 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash -162191269, now seen corresponding path program 1 times [2022-11-25 23:48:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:06,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130734631] [2022-11-25 23:48:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:06,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:06,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130734631] [2022-11-25 23:48:06,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130734631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:06,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:06,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819255599] [2022-11-25 23:48:06,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:06,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:06,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:06,269 INFO L87 Difference]: Start difference. First operand 9656 states and 48281 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:06,386 INFO L93 Difference]: Finished difference Result 7942 states and 39531 transitions. [2022-11-25 23:48:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:48:06,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:06,417 INFO L225 Difference]: With dead ends: 7942 [2022-11-25 23:48:06,417 INFO L226 Difference]: Without dead ends: 7942 [2022-11-25 23:48:06,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:06,418 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:06,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 4 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:48:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7942 states. [2022-11-25 23:48:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7942 to 7942. [2022-11-25 23:48:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7942 states, 7879 states have (on average 5.017261073740323) internal successors, (39531), 7941 states have internal predecessors, (39531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7942 states to 7942 states and 39531 transitions. [2022-11-25 23:48:06,604 INFO L78 Accepts]: Start accepts. Automaton has 7942 states and 39531 transitions. Word has length 9 [2022-11-25 23:48:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:06,604 INFO L495 AbstractCegarLoop]: Abstraction has 7942 states and 39531 transitions. [2022-11-25 23:48:06,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7942 states and 39531 transitions. [2022-11-25 23:48:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:48:06,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:06,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:06,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 23:48:06,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -162191268, now seen corresponding path program 1 times [2022-11-25 23:48:06,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:06,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768568603] [2022-11-25 23:48:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:06,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:06,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768568603] [2022-11-25 23:48:06,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768568603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:06,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011702715] [2022-11-25 23:48:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:06,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:06,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:06,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:48:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:06,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:48:06,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:06,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011702715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:06,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788282438] [2022-11-25 23:48:06,827 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:06,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:06,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 23:48:06,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929831018] [2022-11-25 23:48:06,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:06,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:48:06,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:06,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:48:06,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:06,830 INFO L87 Difference]: Start difference. First operand 7942 states and 39531 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:07,189 INFO L93 Difference]: Finished difference Result 18672 states and 92527 transitions. [2022-11-25 23:48:07,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:48:07,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:48:07,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:07,564 INFO L225 Difference]: With dead ends: 18672 [2022-11-25 23:48:07,564 INFO L226 Difference]: Without dead ends: 18648 [2022-11-25 23:48:07,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:07,570 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 130 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:07,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 19 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:48:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2022-11-25 23:48:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 14252. [2022-11-25 23:48:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14252 states, 14189 states have (on average 5.353865670589894) internal successors, (75966), 14251 states have internal predecessors, (75966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14252 states to 14252 states and 75966 transitions. [2022-11-25 23:48:07,951 INFO L78 Accepts]: Start accepts. Automaton has 14252 states and 75966 transitions. Word has length 9 [2022-11-25 23:48:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:07,951 INFO L495 AbstractCegarLoop]: Abstraction has 14252 states and 75966 transitions. [2022-11-25 23:48:07,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 14252 states and 75966 transitions. [2022-11-25 23:48:07,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:48:07,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:07,952 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:07,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:08,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:48:08,153 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash -192405597, now seen corresponding path program 1 times [2022-11-25 23:48:08,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:08,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816065160] [2022-11-25 23:48:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:08,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:08,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816065160] [2022-11-25 23:48:08,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816065160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:08,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155557140] [2022-11-25 23:48:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:08,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:08,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:08,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:08,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:48:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:08,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:48:08,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:08,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:08,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155557140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:08,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965030007] [2022-11-25 23:48:08,356 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:08,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:08,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:48:08,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738922417] [2022-11-25 23:48:08,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:08,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:48:08,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:48:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:08,360 INFO L87 Difference]: Start difference. First operand 14252 states and 75966 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:09,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:09,234 INFO L93 Difference]: Finished difference Result 31780 states and 169956 transitions. [2022-11-25 23:48:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:48:09,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:48:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:09,413 INFO L225 Difference]: With dead ends: 31780 [2022-11-25 23:48:09,413 INFO L226 Difference]: Without dead ends: 31780 [2022-11-25 23:48:09,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:48:09,414 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 121 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:09,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 29 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:48:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31780 states. [2022-11-25 23:48:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31780 to 21680. [2022-11-25 23:48:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21680 states, 21617 states have (on average 5.900680020354351) internal successors, (127555), 21679 states have internal predecessors, (127555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21680 states to 21680 states and 127555 transitions. [2022-11-25 23:48:10,439 INFO L78 Accepts]: Start accepts. Automaton has 21680 states and 127555 transitions. Word has length 10 [2022-11-25 23:48:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:10,439 INFO L495 AbstractCegarLoop]: Abstraction has 21680 states and 127555 transitions. [2022-11-25 23:48:10,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 21680 states and 127555 transitions. [2022-11-25 23:48:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:48:10,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:10,440 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:10,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 23:48:10,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:48:10,647 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash -192405616, now seen corresponding path program 1 times [2022-11-25 23:48:10,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:10,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267435026] [2022-11-25 23:48:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:10,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267435026] [2022-11-25 23:48:10,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267435026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:10,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149038752] [2022-11-25 23:48:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:10,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:10,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:10,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:10,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:48:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:10,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:48:10,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:10,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:48:10,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149038752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:10,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:48:10,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-25 23:48:10,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600058268] [2022-11-25 23:48:10,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:10,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:48:10,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:10,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:48:10,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:10,832 INFO L87 Difference]: Start difference. First operand 21680 states and 127555 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:11,243 INFO L93 Difference]: Finished difference Result 22418 states and 120457 transitions. [2022-11-25 23:48:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:48:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:48:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:11,377 INFO L225 Difference]: With dead ends: 22418 [2022-11-25 23:48:11,377 INFO L226 Difference]: Without dead ends: 22292 [2022-11-25 23:48:11,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:48:11,378 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:11,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 15 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22292 states. [2022-11-25 23:48:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22292 to 19332. [2022-11-25 23:48:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19332 states, 19285 states have (on average 5.554316826549131) internal successors, (107115), 19331 states have internal predecessors, (107115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19332 states to 19332 states and 107115 transitions. [2022-11-25 23:48:12,473 INFO L78 Accepts]: Start accepts. Automaton has 19332 states and 107115 transitions. Word has length 10 [2022-11-25 23:48:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:12,474 INFO L495 AbstractCegarLoop]: Abstraction has 19332 states and 107115 transitions. [2022-11-25 23:48:12,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 19332 states and 107115 transitions. [2022-11-25 23:48:12,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:48:12,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:12,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:12,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:12,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:48:12,682 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread4Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash 354857, now seen corresponding path program 1 times [2022-11-25 23:48:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:12,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463626802] [2022-11-25 23:48:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:12,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:12,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:12,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463626802] [2022-11-25 23:48:12,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463626802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:12,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:12,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970793944] [2022-11-25 23:48:12,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:12,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:12,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:12,721 INFO L87 Difference]: Start difference. First operand 19332 states and 107115 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:13,020 INFO L93 Difference]: Finished difference Result 26128 states and 145093 transitions. [2022-11-25 23:48:13,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:48:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:13,146 INFO L225 Difference]: With dead ends: 26128 [2022-11-25 23:48:13,146 INFO L226 Difference]: Without dead ends: 26010 [2022-11-25 23:48:13,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:13,147 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:13,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2022-11-25 23:48:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 22316. [2022-11-25 23:48:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22316 states, 22269 states have (on average 5.710674031164399) internal successors, (127171), 22315 states have internal predecessors, (127171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:14,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22316 states to 22316 states and 127171 transitions. [2022-11-25 23:48:14,287 INFO L78 Accepts]: Start accepts. Automaton has 22316 states and 127171 transitions. Word has length 12 [2022-11-25 23:48:14,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:14,287 INFO L495 AbstractCegarLoop]: Abstraction has 22316 states and 127171 transitions. [2022-11-25 23:48:14,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:14,287 INFO L276 IsEmpty]: Start isEmpty. Operand 22316 states and 127171 transitions. [2022-11-25 23:48:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:48:14,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:14,289 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 23:48:14,289 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1403031, now seen corresponding path program 2 times [2022-11-25 23:48:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:14,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285173603] [2022-11-25 23:48:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:14,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285173603] [2022-11-25 23:48:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285173603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813445099] [2022-11-25 23:48:14,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:48:14,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:14,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:14,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:48:14,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:48:14,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:48:14,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:14,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:14,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813445099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572460907] [2022-11-25 23:48:14,587 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:14,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:14,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 23:48:14,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262553128] [2022-11-25 23:48:14,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:14,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 23:48:14,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 23:48:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:48:14,590 INFO L87 Difference]: Start difference. First operand 22316 states and 127171 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:16,042 INFO L93 Difference]: Finished difference Result 68486 states and 378531 transitions. [2022-11-25 23:48:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:48:16,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:48:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:16,503 INFO L225 Difference]: With dead ends: 68486 [2022-11-25 23:48:16,504 INFO L226 Difference]: Without dead ends: 68390 [2022-11-25 23:48:16,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:48:16,505 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 452 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:16,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 37 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:48:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68390 states. [2022-11-25 23:48:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68390 to 40262. [2022-11-25 23:48:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40262 states, 40215 states have (on average 5.9222926768618676) internal successors, (238165), 40261 states have internal predecessors, (238165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40262 states to 40262 states and 238165 transitions. [2022-11-25 23:48:19,283 INFO L78 Accepts]: Start accepts. Automaton has 40262 states and 238165 transitions. Word has length 12 [2022-11-25 23:48:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:19,283 INFO L495 AbstractCegarLoop]: Abstraction has 40262 states and 238165 transitions. [2022-11-25 23:48:19,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 40262 states and 238165 transitions. [2022-11-25 23:48:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:48:19,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:19,288 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-25 23:48:19,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 23:48:19,489 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1720712170, now seen corresponding path program 3 times [2022-11-25 23:48:19,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:19,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799435516] [2022-11-25 23:48:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:19,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:19,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799435516] [2022-11-25 23:48:19,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799435516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:19,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903507192] [2022-11-25 23:48:19,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:48:19,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:19,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:19,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:48:19,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:48:19,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:48:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:19,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:48:20,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903507192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:20,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575106979] [2022-11-25 23:48:20,095 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:48:20,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:48:20,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-25 23:48:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132115036] [2022-11-25 23:48:20,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:20,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:48:20,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:48:20,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:48:20,098 INFO L87 Difference]: Start difference. First operand 40262 states and 238165 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:23,976 INFO L93 Difference]: Finished difference Result 177160 states and 982377 transitions. [2022-11-25 23:48:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:48:23,976 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:48:23,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:25,391 INFO L225 Difference]: With dead ends: 177160 [2022-11-25 23:48:25,391 INFO L226 Difference]: Without dead ends: 177112 [2022-11-25 23:48:25,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:48:25,392 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1430 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:25,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 70 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:48:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177112 states. [2022-11-25 23:48:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177112 to 79778. [2022-11-25 23:48:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79778 states, 79731 states have (on average 5.978565426245751) internal successors, (476677), 79777 states have internal predecessors, (476677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79778 states to 79778 states and 476677 transitions. [2022-11-25 23:48:31,671 INFO L78 Accepts]: Start accepts. Automaton has 79778 states and 476677 transitions. Word has length 14 [2022-11-25 23:48:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:31,688 INFO L495 AbstractCegarLoop]: Abstraction has 79778 states and 476677 transitions. [2022-11-25 23:48:31,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 79778 states and 476677 transitions. [2022-11-25 23:48:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:48:31,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:31,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:31,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:31,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbc3c06-d9ac-444d-b99c-2802835d3061/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:31,900 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-25 23:48:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 457048433, now seen corresponding path program 1 times [2022-11-25 23:48:31,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:48:31,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940876248] [2022-11-25 23:48:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:48:31,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:48:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:48:31,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:31,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940876248] [2022-11-25 23:48:31,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940876248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:48:31,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:48:31,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:48:31,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7817478] [2022-11-25 23:48:31,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:48:31,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:48:31,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:48:31,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:48:31,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:31,942 INFO L87 Difference]: Start difference. First operand 79778 states and 476677 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:48:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:32,882 INFO L93 Difference]: Finished difference Result 70936 states and 419303 transitions. [2022-11-25 23:48:32,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:48:32,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:48:32,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:34,095 INFO L225 Difference]: With dead ends: 70936 [2022-11-25 23:48:34,111 INFO L226 Difference]: Without dead ends: 70936 [2022-11-25 23:48:34,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:48:34,112 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:34,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:48:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70936 states.