./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --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_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/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_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/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_910004e8-0218-4c48-a034-c453f0e190c8/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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- 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 [2022-11-26 00:53:45,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:53:45,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:53:45,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:53:45,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:53:45,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:53:45,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:53:45,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:53:45,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:53:45,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:53:45,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:53:45,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:53:45,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:53:45,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:53:45,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:53:45,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:53:45,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:53:45,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:53:45,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:53:45,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:53:45,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:53:45,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:53:45,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:53:45,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:53:45,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:53:45,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:53:45,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:53:45,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:53:45,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:53:45,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:53:45,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:53:45,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:53:45,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:53:45,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:53:45,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:53:45,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:53:45,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:53:45,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:53:45,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:53:45,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:53:45,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:53:45,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-26 00:53:45,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:53:45,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:53:45,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:53:45,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:53:45,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:53:45,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:53:45,981 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:53:45,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:53:45,981 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:53:45,981 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:53:45,982 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:53:45,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:53:45,983 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:53:45,983 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:53:45,983 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:53:45,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:53:45,984 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:53:45,984 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:53:45,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:53:45,985 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:53:45,985 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:53:45,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:53:45,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:53:45,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:53:45,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:53:45,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:53:45,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:53:45,987 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:53:45,987 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:53:45,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:53:45,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:53:45,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:53:45,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:53:45,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:53:45,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:53:45,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:53:45,990 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:53:45,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:53:45,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:53:45,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:53:45,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:53:45,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:53:45,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:53:45,992 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_910004e8-0218-4c48-a034-c453f0e190c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-11-26 00:53:46,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:53:46,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:53:46,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:53:46,359 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:53:46,359 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:53:46,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-26 00:53:49,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:53:49,791 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:53:49,799 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-26 00:53:49,821 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/data/8971fd7e1/51c225da7f294bc1910b9db0b6ed8be8/FLAG322393a91 [2022-11-26 00:53:49,837 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/data/8971fd7e1/51c225da7f294bc1910b9db0b6ed8be8 [2022-11-26 00:53:49,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:53:49,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:53:49,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:53:49,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:53:49,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:53:49,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:53:49" (1/1) ... [2022-11-26 00:53:49,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709215ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:49, skipping insertion in model container [2022-11-26 00:53:49,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:53:49" (1/1) ... [2022-11-26 00:53:49,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:53:49,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:53:50,447 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_910004e8-0218-4c48-a034-c453f0e190c8/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-26 00:53:50,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:53:50,494 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:53:50,564 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_910004e8-0218-4c48-a034-c453f0e190c8/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-26 00:53:50,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:53:50,693 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:53:50,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50 WrapperNode [2022-11-26 00:53:50,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:53:50,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:53:50,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:53:50,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:53:50,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,782 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-11-26 00:53:50,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:53:50,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:53:50,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:53:50,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:53:50,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,826 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:53:50,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:53:50,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:53:50,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:53:50,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (1/1) ... [2022-11-26 00:53:50,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:53:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:50,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:53:50,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:53:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-26 00:53:50,958 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-26 00:53:50,958 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-26 00:53:50,959 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-26 00:53:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:53:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:53:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:53:50,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:53:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-26 00:53:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:53:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:53:50,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:53:50,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:53:50,962 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 00:53:51,199 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:53:51,202 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:53:51,606 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:53:51,616 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:53:51,616 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:53:51,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:53:51 BoogieIcfgContainer [2022-11-26 00:53:51,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:53:51,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:53:51,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:53:51,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:53:51,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:53:49" (1/3) ... [2022-11-26 00:53:51,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fef36d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:53:51, skipping insertion in model container [2022-11-26 00:53:51,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:53:50" (2/3) ... [2022-11-26 00:53:51,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fef36d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:53:51, skipping insertion in model container [2022-11-26 00:53:51,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:53:51" (3/3) ... [2022-11-26 00:53:51,629 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-11-26 00:53:51,638 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-26 00:53:51,650 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:53:51,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-26 00:53:51,651 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:53:51,806 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-26 00:53:51,857 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:53:51,885 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 190 places, 193 transitions, 402 flow [2022-11-26 00:53:51,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 190 places, 193 transitions, 402 flow [2022-11-26 00:53:51,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 193 transitions, 402 flow [2022-11-26 00:53:52,007 INFO L130 PetriNetUnfolder]: 10/191 cut-off events. [2022-11-26 00:53:52,007 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-26 00:53:52,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 191 events. 10/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 495 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 149. Up to 3 conditions per place. [2022-11-26 00:53:52,032 INFO L119 LiptonReduction]: Number of co-enabled transitions 11596 [2022-11-26 00:53:57,951 INFO L134 LiptonReduction]: Checked pairs total: 15413 [2022-11-26 00:53:57,952 INFO L136 LiptonReduction]: Total number of compositions: 180 [2022-11-26 00:53:57,965 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 46 transitions, 108 flow [2022-11-26 00:53:58,039 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 540 states, 516 states have (on average 2.808139534883721) internal successors, (1449), 539 states have internal predecessors, (1449), 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) [2022-11-26 00:53:58,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:53:58,072 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;@12d9f65d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:53:58,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-26 00:53:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 540 states, 516 states have (on average 2.808139534883721) internal successors, (1449), 539 states have internal predecessors, (1449), 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) [2022-11-26 00:53:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:53:58,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:58,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:58,086 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:53:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1626597559, now seen corresponding path program 1 times [2022-11-26 00:53:58,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:58,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293274982] [2022-11-26 00:53:58,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:58,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:53:58,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:58,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293274982] [2022-11-26 00:53:58,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293274982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:58,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:58,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:53:58,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323502089] [2022-11-26 00:53:58,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:58,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:53:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:53:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:53:58,428 INFO L87 Difference]: Start difference. First operand has 540 states, 516 states have (on average 2.808139534883721) internal successors, (1449), 539 states have internal predecessors, (1449), 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-26 00:53:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:58,555 INFO L93 Difference]: Finished difference Result 540 states and 1415 transitions. [2022-11-26 00:53:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:53:58,558 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-11-26 00:53:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:58,584 INFO L225 Difference]: With dead ends: 540 [2022-11-26 00:53:58,584 INFO L226 Difference]: Without dead ends: 540 [2022-11-26 00:53:58,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:53:58,590 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:58,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-26 00:53:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-11-26 00:53:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 516 states have (on average 2.742248062015504) internal successors, (1415), 539 states have internal predecessors, (1415), 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) [2022-11-26 00:53:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1415 transitions. [2022-11-26 00:53:58,698 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1415 transitions. Word has length 7 [2022-11-26 00:53:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:58,699 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 1415 transitions. [2022-11-26 00:53:58,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-26 00:53:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1415 transitions. [2022-11-26 00:53:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:53:58,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:58,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:58,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:53:58,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:53:58,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:58,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1832270346, now seen corresponding path program 1 times [2022-11-26 00:53:58,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:58,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702420844] [2022-11-26 00:53:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:58,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:53:58,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:58,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702420844] [2022-11-26 00:53:58,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702420844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:58,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:58,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:53:58,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244292575] [2022-11-26 00:53:58,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:58,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:53:58,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:58,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:53:58,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:53:58,858 INFO L87 Difference]: Start difference. First operand 540 states and 1415 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-26 00:53:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:58,986 INFO L93 Difference]: Finished difference Result 792 states and 2026 transitions. [2022-11-26 00:53:58,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:58,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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 [2022-11-26 00:53:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:58,991 INFO L225 Difference]: With dead ends: 792 [2022-11-26 00:53:58,992 INFO L226 Difference]: Without dead ends: 792 [2022-11-26 00:53:58,992 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 [2022-11-26 00:53:58,993 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:58,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 5 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-11-26 00:53:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 754. [2022-11-26 00:53:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 730 states have (on average 2.7383561643835614) internal successors, (1999), 753 states have internal predecessors, (1999), 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) [2022-11-26 00:53:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1999 transitions. [2022-11-26 00:53:59,020 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1999 transitions. Word has length 8 [2022-11-26 00:53:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:59,021 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1999 transitions. [2022-11-26 00:53:59,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-26 00:53:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1999 transitions. [2022-11-26 00:53:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:53:59,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:59,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:59,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:53:59,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:53:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:59,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1832319580, now seen corresponding path program 1 times [2022-11-26 00:53:59,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:59,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592367457] [2022-11-26 00:53:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:59,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:59,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:53:59,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592367457] [2022-11-26 00:53:59,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592367457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:59,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:59,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:53:59,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71930993] [2022-11-26 00:53:59,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:59,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:53:59,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:59,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:53:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:53:59,103 INFO L87 Difference]: Start difference. First operand 754 states and 1999 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) [2022-11-26 00:53:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:59,229 INFO L93 Difference]: Finished difference Result 1232 states and 3271 transitions. [2022-11-26 00:53:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:59,230 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 [2022-11-26 00:53:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:59,236 INFO L225 Difference]: With dead ends: 1232 [2022-11-26 00:53:59,237 INFO L226 Difference]: Without dead ends: 1232 [2022-11-26 00:53:59,237 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 [2022-11-26 00:53:59,238 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:59,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 5 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-11-26 00:53:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1172. [2022-11-26 00:53:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1148 states have (on average 2.769163763066202) internal successors, (3179), 1171 states have internal predecessors, (3179), 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) [2022-11-26 00:53:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 3179 transitions. [2022-11-26 00:53:59,277 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 3179 transitions. Word has length 8 [2022-11-26 00:53:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:59,277 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 3179 transitions. [2022-11-26 00:53:59,278 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) [2022-11-26 00:53:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 3179 transitions. [2022-11-26 00:53:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:53:59,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:59,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:59,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:53:59,280 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:53:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1898136628, now seen corresponding path program 1 times [2022-11-26 00:53:59,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:59,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311229756] [2022-11-26 00:53:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:59,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:53:59,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311229756] [2022-11-26 00:53:59,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311229756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:59,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:59,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:53:59,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819879808] [2022-11-26 00:53:59,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:59,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:53:59,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:59,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:53:59,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:53:59,379 INFO L87 Difference]: Start difference. First operand 1172 states and 3179 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-26 00:53:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:59,495 INFO L93 Difference]: Finished difference Result 1124 states and 3038 transitions. [2022-11-26 00:53:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-11-26 00:53:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:59,502 INFO L225 Difference]: With dead ends: 1124 [2022-11-26 00:53:59,503 INFO L226 Difference]: Without dead ends: 1124 [2022-11-26 00:53:59,503 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 [2022-11-26 00:53:59,504 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:59,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 4 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-26 00:53:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2022-11-26 00:53:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1105 states have (on average 2.749321266968326) internal successors, (3038), 1123 states have internal predecessors, (3038), 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) [2022-11-26 00:53:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3038 transitions. [2022-11-26 00:53:59,540 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3038 transitions. Word has length 11 [2022-11-26 00:53:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:59,540 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 3038 transitions. [2022-11-26 00:53:59,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-26 00:53:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3038 transitions. [2022-11-26 00:53:59,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:53:59,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:59,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:59,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:53:59,543 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:53:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:59,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1898136750, now seen corresponding path program 1 times [2022-11-26 00:53:59,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:59,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131093046] [2022-11-26 00:53:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:59,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:53:59,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131093046] [2022-11-26 00:53:59,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131093046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:59,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:59,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:53:59,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627020677] [2022-11-26 00:53:59,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:59,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:53:59,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:59,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:53:59,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:53:59,598 INFO L87 Difference]: Start difference. First operand 1124 states and 3038 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-26 00:53:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:59,700 INFO L93 Difference]: Finished difference Result 1076 states and 2897 transitions. [2022-11-26 00:53:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:59,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-11-26 00:53:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:59,706 INFO L225 Difference]: With dead ends: 1076 [2022-11-26 00:53:59,707 INFO L226 Difference]: Without dead ends: 1030 [2022-11-26 00:53:59,707 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 [2022-11-26 00:53:59,708 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:59,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 4 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-11-26 00:53:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 672. [2022-11-26 00:53:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 658 states have (on average 2.7279635258358663) internal successors, (1795), 671 states have internal predecessors, (1795), 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) [2022-11-26 00:53:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1795 transitions. [2022-11-26 00:53:59,734 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1795 transitions. Word has length 11 [2022-11-26 00:53:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:59,734 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1795 transitions. [2022-11-26 00:53:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-26 00:53:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1795 transitions. [2022-11-26 00:53:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:53:59,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:59,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:59,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:53:59,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:53:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1048156379, now seen corresponding path program 1 times [2022-11-26 00:53:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132317924] [2022-11-26 00:53:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:59,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:53:59,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132317924] [2022-11-26 00:53:59,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132317924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:59,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:59,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:53:59,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070670999] [2022-11-26 00:53:59,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:59,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:53:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:53:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:53:59,834 INFO L87 Difference]: Start difference. First operand 672 states and 1795 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) [2022-11-26 00:53:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:59,955 INFO L93 Difference]: Finished difference Result 876 states and 2338 transitions. [2022-11-26 00:53:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:53:59,956 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 [2022-11-26 00:53:59,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:59,961 INFO L225 Difference]: With dead ends: 876 [2022-11-26 00:53:59,961 INFO L226 Difference]: Without dead ends: 876 [2022-11-26 00:53:59,961 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 [2022-11-26 00:53:59,962 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:59,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-26 00:53:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2022-11-26 00:53:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 862 states have (on average 2.7122969837587005) internal successors, (2338), 875 states have internal predecessors, (2338), 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) [2022-11-26 00:53:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2338 transitions. [2022-11-26 00:53:59,990 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2338 transitions. Word has length 12 [2022-11-26 00:53:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:59,990 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 2338 transitions. [2022-11-26 00:53:59,990 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) [2022-11-26 00:53:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2338 transitions. [2022-11-26 00:53:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:53:59,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:59,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:59,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:53:59,992 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:53:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1479338905, now seen corresponding path program 1 times [2022-11-26 00:53:59,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:59,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160240242] [2022-11-26 00:53:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:59,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:00,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:00,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160240242] [2022-11-26 00:54:00,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160240242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:00,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:00,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:54:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202837759] [2022-11-26 00:54:00,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:00,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:00,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:00,143 INFO L87 Difference]: Start difference. First operand 876 states and 2338 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-11-26 00:54:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:00,242 INFO L93 Difference]: Finished difference Result 514 states and 1218 transitions. [2022-11-26 00:54:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:00,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2022-11-26 00:54:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:00,245 INFO L225 Difference]: With dead ends: 514 [2022-11-26 00:54:00,246 INFO L226 Difference]: Without dead ends: 514 [2022-11-26 00:54:00,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:00,247 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:00,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:54:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-26 00:54:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 510. [2022-11-26 00:54:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 498 states have (on average 2.42570281124498) internal successors, (1208), 509 states have internal predecessors, (1208), 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) [2022-11-26 00:54:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1208 transitions. [2022-11-26 00:54:00,268 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1208 transitions. Word has length 15 [2022-11-26 00:54:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:00,268 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 1208 transitions. [2022-11-26 00:54:00,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-11-26 00:54:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1208 transitions. [2022-11-26 00:54:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:54:00,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:00,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:00,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:54:00,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1979110342, now seen corresponding path program 1 times [2022-11-26 00:54:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:00,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653234603] [2022-11-26 00:54:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:00,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653234603] [2022-11-26 00:54:00,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653234603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:00,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:00,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:54:00,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828431049] [2022-11-26 00:54:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:00,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:54:00,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:54:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:00,378 INFO L87 Difference]: Start difference. First operand 510 states and 1208 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-26 00:54:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:00,532 INFO L93 Difference]: Finished difference Result 698 states and 1676 transitions. [2022-11-26 00:54:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:54:00,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-11-26 00:54:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:00,536 INFO L225 Difference]: With dead ends: 698 [2022-11-26 00:54:00,536 INFO L226 Difference]: Without dead ends: 698 [2022-11-26 00:54:00,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:54:00,538 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:00,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 8 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:54:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-26 00:54:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 664. [2022-11-26 00:54:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 652 states have (on average 2.476993865030675) internal successors, (1615), 663 states have internal predecessors, (1615), 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) [2022-11-26 00:54:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1615 transitions. [2022-11-26 00:54:00,559 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1615 transitions. Word has length 17 [2022-11-26 00:54:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:00,559 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1615 transitions. [2022-11-26 00:54:00,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-26 00:54:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1615 transitions. [2022-11-26 00:54:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:54:00,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:00,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:00,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:54:00,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1979110300, now seen corresponding path program 1 times [2022-11-26 00:54:00,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:00,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459971379] [2022-11-26 00:54:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:00,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:00,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:00,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459971379] [2022-11-26 00:54:00,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459971379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:00,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:00,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:54:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379546655] [2022-11-26 00:54:00,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:00,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:54:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:54:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:54:00,654 INFO L87 Difference]: Start difference. First operand 664 states and 1615 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-26 00:54:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:00,829 INFO L93 Difference]: Finished difference Result 864 states and 2074 transitions. [2022-11-26 00:54:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:54:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-11-26 00:54:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:00,834 INFO L225 Difference]: With dead ends: 864 [2022-11-26 00:54:00,834 INFO L226 Difference]: Without dead ends: 864 [2022-11-26 00:54:00,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:54:00,835 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:00,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 10 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:54:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-11-26 00:54:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 830. [2022-11-26 00:54:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 818 states have (on average 2.460880195599022) internal successors, (2013), 829 states have internal predecessors, (2013), 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) [2022-11-26 00:54:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2013 transitions. [2022-11-26 00:54:00,862 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2013 transitions. Word has length 17 [2022-11-26 00:54:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:00,862 INFO L495 AbstractCegarLoop]: Abstraction has 830 states and 2013 transitions. [2022-11-26 00:54:00,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2022-11-26 00:54:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2013 transitions. [2022-11-26 00:54:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:54:00,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:00,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:54:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:54:00,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash -206011530, now seen corresponding path program 1 times [2022-11-26 00:54:00,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223015584] [2022-11-26 00:54:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:54:00,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:00,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223015584] [2022-11-26 00:54:00,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223015584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:00,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:00,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:54:00,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659381111] [2022-11-26 00:54:00,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:00,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:00,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:00,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:00,958 INFO L87 Difference]: Start difference. First operand 830 states and 2013 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-11-26 00:54:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:01,039 INFO L93 Difference]: Finished difference Result 764 states and 1822 transitions. [2022-11-26 00:54:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:01,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2022-11-26 00:54:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:01,044 INFO L225 Difference]: With dead ends: 764 [2022-11-26 00:54:01,044 INFO L226 Difference]: Without dead ends: 764 [2022-11-26 00:54:01,044 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 [2022-11-26 00:54:01,045 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4 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 [2022-11-26 00:54:01,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:54:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-26 00:54:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 764. [2022-11-26 00:54:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 755 states have (on average 2.4132450331125828) internal successors, (1822), 763 states have internal predecessors, (1822), 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) [2022-11-26 00:54:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1822 transitions. [2022-11-26 00:54:01,069 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1822 transitions. Word has length 21 [2022-11-26 00:54:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:01,069 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1822 transitions. [2022-11-26 00:54:01,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-11-26 00:54:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1822 transitions. [2022-11-26 00:54:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:54:01,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:01,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:54:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:54:01,071 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash -206011560, now seen corresponding path program 1 times [2022-11-26 00:54:01,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:01,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282758407] [2022-11-26 00:54:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:01,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:01,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:01,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282758407] [2022-11-26 00:54:01,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282758407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:01,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:01,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:54:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977530401] [2022-11-26 00:54:01,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:01,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:54:01,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:54:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:54:01,167 INFO L87 Difference]: Start difference. First operand 764 states and 1822 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-11-26 00:54:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:01,229 INFO L93 Difference]: Finished difference Result 698 states and 1631 transitions. [2022-11-26 00:54:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:54:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2022-11-26 00:54:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:01,233 INFO L225 Difference]: With dead ends: 698 [2022-11-26 00:54:01,233 INFO L226 Difference]: Without dead ends: 698 [2022-11-26 00:54:01,233 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 [2022-11-26 00:54:01,234 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:01,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 4 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:54:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-26 00:54:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 596. [2022-11-26 00:54:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 590 states have (on average 2.3491525423728814) internal successors, (1386), 595 states have internal predecessors, (1386), 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) [2022-11-26 00:54:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1386 transitions. [2022-11-26 00:54:01,253 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1386 transitions. Word has length 21 [2022-11-26 00:54:01,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:01,253 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 1386 transitions. [2022-11-26 00:54:01,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-11-26 00:54:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1386 transitions. [2022-11-26 00:54:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:54:01,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:01,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:01,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:54:01,256 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:01,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1541533175, now seen corresponding path program 1 times [2022-11-26 00:54:01,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:01,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777225414] [2022-11-26 00:54:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:01,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:01,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:01,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777225414] [2022-11-26 00:54:01,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777225414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:01,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:54:01,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:54:01,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093325827] [2022-11-26 00:54:01,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:01,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:54:01,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:54:01,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:54:01,391 INFO L87 Difference]: Start difference. First operand 596 states and 1386 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-11-26 00:54:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:01,629 INFO L93 Difference]: Finished difference Result 722 states and 1686 transitions. [2022-11-26 00:54:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:54:01,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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 25 [2022-11-26 00:54:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:01,633 INFO L225 Difference]: With dead ends: 722 [2022-11-26 00:54:01,633 INFO L226 Difference]: Without dead ends: 722 [2022-11-26 00:54:01,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:54:01,634 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 65 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:01,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 11 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:54:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-11-26 00:54:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 696. [2022-11-26 00:54:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 2.363768115942029) internal successors, (1631), 695 states have internal predecessors, (1631), 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) [2022-11-26 00:54:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1631 transitions. [2022-11-26 00:54:01,654 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1631 transitions. Word has length 25 [2022-11-26 00:54:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:01,655 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 1631 transitions. [2022-11-26 00:54:01,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2022-11-26 00:54:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1631 transitions. [2022-11-26 00:54:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:54:01,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:01,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:01,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:54:01,657 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:01,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1541533217, now seen corresponding path program 1 times [2022-11-26 00:54:01,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:01,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033466755] [2022-11-26 00:54:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:01,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:01,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033466755] [2022-11-26 00:54:01,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033466755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:01,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557118936] [2022-11-26 00:54:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:01,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:01,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:01,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:54:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:54:01,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:02,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:02,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:02,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557118936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:02,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981964780] [2022-11-26 00:54:02,159 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) [2022-11-26 00:54:02,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:02,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-11-26 00:54:02,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759168806] [2022-11-26 00:54:02,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:54:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:54:02,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:54:02,164 INFO L87 Difference]: Start difference. First operand 696 states and 1631 transitions. Second operand has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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) [2022-11-26 00:54:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:02,493 INFO L93 Difference]: Finished difference Result 742 states and 1742 transitions. [2022-11-26 00:54:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:54:02,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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 25 [2022-11-26 00:54:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:02,497 INFO L225 Difference]: With dead ends: 742 [2022-11-26 00:54:02,497 INFO L226 Difference]: Without dead ends: 680 [2022-11-26 00:54:02,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:54:02,498 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 115 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:02,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 21 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:54:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-26 00:54:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 464. [2022-11-26 00:54:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 461 states have (on average 2.334056399132321) internal successors, (1076), 463 states have internal predecessors, (1076), 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) [2022-11-26 00:54:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1076 transitions. [2022-11-26 00:54:02,514 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1076 transitions. Word has length 25 [2022-11-26 00:54:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:02,514 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 1076 transitions. [2022-11-26 00:54:02,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 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) [2022-11-26 00:54:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1076 transitions. [2022-11-26 00:54:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:54:02,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:02,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:02,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:02,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:02,722 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash 42765777, now seen corresponding path program 1 times [2022-11-26 00:54:02,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:02,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695965746] [2022-11-26 00:54:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:02,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:02,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695965746] [2022-11-26 00:54:02,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695965746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446730501] [2022-11-26 00:54:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:02,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:02,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:02,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:02,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:54:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:54:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:03,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:03,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446730501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:03,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622486002] [2022-11-26 00:54:03,206 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) [2022-11-26 00:54:03,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:03,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-26 00:54:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694632913] [2022-11-26 00:54:03,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:03,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:54:03,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:54:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:54:03,210 INFO L87 Difference]: Start difference. First operand 464 states and 1076 transitions. Second operand has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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) [2022-11-26 00:54:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:03,569 INFO L93 Difference]: Finished difference Result 800 states and 1837 transitions. [2022-11-26 00:54:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:54:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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 26 [2022-11-26 00:54:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:03,573 INFO L225 Difference]: With dead ends: 800 [2022-11-26 00:54:03,573 INFO L226 Difference]: Without dead ends: 698 [2022-11-26 00:54:03,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:54:03,574 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 152 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:03,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 20 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:54:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-26 00:54:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 590. [2022-11-26 00:54:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 588 states have (on average 2.314625850340136) internal successors, (1361), 589 states have internal predecessors, (1361), 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) [2022-11-26 00:54:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1361 transitions. [2022-11-26 00:54:03,595 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1361 transitions. Word has length 26 [2022-11-26 00:54:03,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:03,596 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 1361 transitions. [2022-11-26 00:54:03,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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) [2022-11-26 00:54:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1361 transitions. [2022-11-26 00:54:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:54:03,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:03,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-26 00:54:03,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:54:03,804 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1845351866, now seen corresponding path program 1 times [2022-11-26 00:54:03,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:03,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108599163] [2022-11-26 00:54:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:03,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:04,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:04,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108599163] [2022-11-26 00:54:04,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108599163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219176702] [2022-11-26 00:54:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:04,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:04,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:04,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:54:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:04,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:54:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:04,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:04,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219176702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:04,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337791612] [2022-11-26 00:54:04,443 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) [2022-11-26 00:54:04,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:04,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-26 00:54:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571237194] [2022-11-26 00:54:04,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:04,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:54:04,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:04,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:54:04,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:54:04,446 INFO L87 Difference]: Start difference. First operand 590 states and 1361 transitions. Second operand has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 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) [2022-11-26 00:54:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:04,905 INFO L93 Difference]: Finished difference Result 1194 states and 2711 transitions. [2022-11-26 00:54:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:54:04,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 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 35 [2022-11-26 00:54:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:04,911 INFO L225 Difference]: With dead ends: 1194 [2022-11-26 00:54:04,911 INFO L226 Difference]: Without dead ends: 1194 [2022-11-26 00:54:04,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:54:04,912 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 237 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:04,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 28 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:54:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-26 00:54:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1048. [2022-11-26 00:54:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1046 states have (on average 2.305927342256214) internal successors, (2412), 1047 states have internal predecessors, (2412), 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) [2022-11-26 00:54:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2412 transitions. [2022-11-26 00:54:04,966 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2412 transitions. Word has length 35 [2022-11-26 00:54:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:04,967 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 2412 transitions. [2022-11-26 00:54:04,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 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) [2022-11-26 00:54:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2412 transitions. [2022-11-26 00:54:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:54:04,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:04,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:04,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:05,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:54:05,175 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 802240792, now seen corresponding path program 1 times [2022-11-26 00:54:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:05,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390076912] [2022-11-26 00:54:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:54:05,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:05,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390076912] [2022-11-26 00:54:05,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390076912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:05,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860748758] [2022-11-26 00:54:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:05,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:05,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:05,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:05,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:54:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:05,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:54:05,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:54:05,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:54:05,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860748758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:05,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117756153] [2022-11-26 00:54:05,742 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) [2022-11-26 00:54:05,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:05,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-11-26 00:54:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072712147] [2022-11-26 00:54:05,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:05,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:54:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:05,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:54:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:54:05,745 INFO L87 Difference]: Start difference. First operand 1048 states and 2412 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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) [2022-11-26 00:54:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:06,129 INFO L93 Difference]: Finished difference Result 1500 states and 3442 transitions. [2022-11-26 00:54:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:54:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 36 [2022-11-26 00:54:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:06,135 INFO L225 Difference]: With dead ends: 1500 [2022-11-26 00:54:06,136 INFO L226 Difference]: Without dead ends: 1500 [2022-11-26 00:54:06,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:54:06,136 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 87 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:06,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 21 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:54:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2022-11-26 00:54:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1270. [2022-11-26 00:54:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1268 states have (on average 2.3272870662460567) internal successors, (2951), 1269 states have internal predecessors, (2951), 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) [2022-11-26 00:54:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2951 transitions. [2022-11-26 00:54:06,175 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2951 transitions. Word has length 36 [2022-11-26 00:54:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:06,176 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 2951 transitions. [2022-11-26 00:54:06,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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) [2022-11-26 00:54:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2951 transitions. [2022-11-26 00:54:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:54:06,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:06,179 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:06,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:54:06,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:06,384 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash 786233963, now seen corresponding path program 2 times [2022-11-26 00:54:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:06,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492513685] [2022-11-26 00:54:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:54:06,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:06,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492513685] [2022-11-26 00:54:06,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492513685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:06,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186504411] [2022-11-26 00:54:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:54:06,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:06,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:06,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:06,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:54:06,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:54:06,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:54:06,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:54:06,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:54:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186504411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:54:06,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:54:06,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2022-11-26 00:54:06,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976764096] [2022-11-26 00:54:06,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:54:06,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:54:06,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:54:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:54:06,974 INFO L87 Difference]: Start difference. First operand 1270 states and 2951 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2022-11-26 00:54:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:07,095 INFO L93 Difference]: Finished difference Result 1356 states and 3130 transitions. [2022-11-26 00:54:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:54:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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 45 [2022-11-26 00:54:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:07,102 INFO L225 Difference]: With dead ends: 1356 [2022-11-26 00:54:07,102 INFO L226 Difference]: Without dead ends: 1356 [2022-11-26 00:54:07,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:54:07,103 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:07,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 8 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:54:07,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-11-26 00:54:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1270. [2022-11-26 00:54:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1268 states have (on average 2.3272870662460567) internal successors, (2951), 1269 states have internal predecessors, (2951), 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) [2022-11-26 00:54:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 2951 transitions. [2022-11-26 00:54:07,139 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 2951 transitions. Word has length 45 [2022-11-26 00:54:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:07,140 INFO L495 AbstractCegarLoop]: Abstraction has 1270 states and 2951 transitions. [2022-11-26 00:54:07,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 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) [2022-11-26 00:54:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 2951 transitions. [2022-11-26 00:54:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:54:07,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:07,143 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:07,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 00:54:07,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:54:07,349 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:07,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1692430728, now seen corresponding path program 3 times [2022-11-26 00:54:07,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:07,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176670104] [2022-11-26 00:54:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:07,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:54:07,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:07,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176670104] [2022-11-26 00:54:07,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176670104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:07,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925890240] [2022-11-26 00:54:07,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:54:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:07,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:07,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:07,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:54:07,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:54:07,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:07,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:54:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:54:08,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:54:08,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925890240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:08,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082911506] [2022-11-26 00:54:08,281 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) [2022-11-26 00:54:08,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:08,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-11-26 00:54:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111428635] [2022-11-26 00:54:08,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:54:08,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:54:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:54:08,286 INFO L87 Difference]: Start difference. First operand 1270 states and 2951 transitions. Second operand has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 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) [2022-11-26 00:54:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:08,943 INFO L93 Difference]: Finished difference Result 1810 states and 4167 transitions. [2022-11-26 00:54:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:54:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 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 54 [2022-11-26 00:54:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:08,953 INFO L225 Difference]: With dead ends: 1810 [2022-11-26 00:54:08,953 INFO L226 Difference]: Without dead ends: 1810 [2022-11-26 00:54:08,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=840, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:54:08,954 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 234 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:08,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 31 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:54:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-11-26 00:54:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1078. [2022-11-26 00:54:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1076 states have (on average 2.313197026022305) internal successors, (2489), 1077 states have internal predecessors, (2489), 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) [2022-11-26 00:54:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2489 transitions. [2022-11-26 00:54:08,993 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2489 transitions. Word has length 54 [2022-11-26 00:54:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:08,993 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 2489 transitions. [2022-11-26 00:54:08,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 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) [2022-11-26 00:54:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2489 transitions. [2022-11-26 00:54:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:54:08,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:08,997 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:09,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:09,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:54:09,203 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash 915097296, now seen corresponding path program 1 times [2022-11-26 00:54:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844623852] [2022-11-26 00:54:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:09,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844623852] [2022-11-26 00:54:09,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844623852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036926029] [2022-11-26 00:54:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:09,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:09,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:09,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:54:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:54:09,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:10,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:10,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036926029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2597337] [2022-11-26 00:54:10,264 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) [2022-11-26 00:54:10,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:10,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-26 00:54:10,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128436222] [2022-11-26 00:54:10,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:10,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:54:10,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:10,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:54:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:54:10,271 INFO L87 Difference]: Start difference. First operand 1078 states and 2489 transitions. Second operand has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 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) [2022-11-26 00:54:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:10,898 INFO L93 Difference]: Finished difference Result 2566 states and 5923 transitions. [2022-11-26 00:54:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:54:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 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 71 [2022-11-26 00:54:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:10,910 INFO L225 Difference]: With dead ends: 2566 [2022-11-26 00:54:10,910 INFO L226 Difference]: Without dead ends: 2566 [2022-11-26 00:54:10,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:54:10,912 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 297 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:10,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 24 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:54:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2022-11-26 00:54:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1594. [2022-11-26 00:54:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 2.402638190954774) internal successors, (3825), 1593 states have internal predecessors, (3825), 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) [2022-11-26 00:54:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 3825 transitions. [2022-11-26 00:54:10,967 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 3825 transitions. Word has length 71 [2022-11-26 00:54:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:10,968 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 3825 transitions. [2022-11-26 00:54:10,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 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) [2022-11-26 00:54:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 3825 transitions. [2022-11-26 00:54:10,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 00:54:10,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:10,973 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2022-11-26 00:54:10,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:11,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:11,180 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:11,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash 243908474, now seen corresponding path program 2 times [2022-11-26 00:54:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:11,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921178217] [2022-11-26 00:54:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:11,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:11,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921178217] [2022-11-26 00:54:11,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921178217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807707192] [2022-11-26 00:54:11,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:54:11,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:11,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:11,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:11,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:54:12,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-26 00:54:12,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:54:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:12,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:54:12,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807707192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:12,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354193708] [2022-11-26 00:54:12,917 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) [2022-11-26 00:54:12,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:12,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-26 00:54:12,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952144616] [2022-11-26 00:54:12,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:12,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:54:12,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:54:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:54:12,920 INFO L87 Difference]: Start difference. First operand 1594 states and 3825 transitions. Second operand has 34 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 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) [2022-11-26 00:54:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:13,995 INFO L93 Difference]: Finished difference Result 3300 states and 7616 transitions. [2022-11-26 00:54:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:54:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 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 71 [2022-11-26 00:54:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:14,007 INFO L225 Difference]: With dead ends: 3300 [2022-11-26 00:54:14,007 INFO L226 Difference]: Without dead ends: 3300 [2022-11-26 00:54:14,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=690, Invalid=1662, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:54:14,009 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 757 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:14,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 52 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:54:14,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2022-11-26 00:54:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2862. [2022-11-26 00:54:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2860 states have (on average 2.352797202797203) internal successors, (6729), 2861 states have internal predecessors, (6729), 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) [2022-11-26 00:54:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 6729 transitions. [2022-11-26 00:54:14,124 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 6729 transitions. Word has length 71 [2022-11-26 00:54:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:14,124 INFO L495 AbstractCegarLoop]: Abstraction has 2862 states and 6729 transitions. [2022-11-26 00:54:14,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.575757575757576) internal successors, (151), 33 states have internal predecessors, (151), 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) [2022-11-26 00:54:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 6729 transitions. [2022-11-26 00:54:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-26 00:54:14,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:14,132 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:14,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:14,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:14,340 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash 901673272, now seen corresponding path program 4 times [2022-11-26 00:54:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:14,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044076159] [2022-11-26 00:54:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:14,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:54:15,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044076159] [2022-11-26 00:54:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044076159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623906164] [2022-11-26 00:54:15,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:54:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:15,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:15,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:54:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:15,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:54:15,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:54:15,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 283 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:54:15,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623906164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:15,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129991398] [2022-11-26 00:54:15,881 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) [2022-11-26 00:54:15,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:15,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 34 [2022-11-26 00:54:15,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134631845] [2022-11-26 00:54:15,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:15,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:54:15,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:54:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:54:15,886 INFO L87 Difference]: Start difference. First operand 2862 states and 6729 transitions. Second operand has 36 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 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) [2022-11-26 00:54:17,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:17,109 INFO L93 Difference]: Finished difference Result 5132 states and 11840 transitions. [2022-11-26 00:54:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 00:54:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 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 90 [2022-11-26 00:54:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:17,125 INFO L225 Difference]: With dead ends: 5132 [2022-11-26 00:54:17,125 INFO L226 Difference]: Without dead ends: 5132 [2022-11-26 00:54:17,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=934, Invalid=2848, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 00:54:17,127 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 555 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:17,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 52 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:54:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2022-11-26 00:54:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 3582. [2022-11-26 00:54:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3580 states have (on average 2.391899441340782) internal successors, (8563), 3581 states have internal predecessors, (8563), 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) [2022-11-26 00:54:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 8563 transitions. [2022-11-26 00:54:17,234 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 8563 transitions. Word has length 90 [2022-11-26 00:54:17,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:17,235 INFO L495 AbstractCegarLoop]: Abstraction has 3582 states and 8563 transitions. [2022-11-26 00:54:17,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 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) [2022-11-26 00:54:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 8563 transitions. [2022-11-26 00:54:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 00:54:17,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:17,244 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:17,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-26 00:54:17,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:17,450 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:17,451 INFO L85 PathProgramCache]: Analyzing trace with hash 57606073, now seen corresponding path program 2 times [2022-11-26 00:54:17,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:17,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567333743] [2022-11-26 00:54:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:18,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:18,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567333743] [2022-11-26 00:54:18,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567333743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:18,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578834555] [2022-11-26 00:54:18,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:54:18,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:18,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:18,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:18,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:54:18,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-26 00:54:18,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:54:18,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:54:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:54:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:19,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:19,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578834555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:19,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329634239] [2022-11-26 00:54:19,425 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) [2022-11-26 00:54:19,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:54:19,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-11-26 00:54:19,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913405758] [2022-11-26 00:54:19,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:54:19,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:54:19,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:54:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:54:19,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:54:19,429 INFO L87 Difference]: Start difference. First operand 3582 states and 8563 transitions. Second operand has 34 states, 33 states have (on average 5.212121212121212) internal successors, (172), 33 states have internal predecessors, (172), 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) [2022-11-26 00:54:20,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:54:20,517 INFO L93 Difference]: Finished difference Result 8812 states and 20617 transitions. [2022-11-26 00:54:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-26 00:54:20,519 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 5.212121212121212) internal successors, (172), 33 states have internal predecessors, (172), 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 98 [2022-11-26 00:54:20,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:54:20,545 INFO L225 Difference]: With dead ends: 8812 [2022-11-26 00:54:20,545 INFO L226 Difference]: Without dead ends: 8812 [2022-11-26 00:54:20,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=739, Invalid=2567, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:54:20,547 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 463 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:54:20,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 44 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:54:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8812 states. [2022-11-26 00:54:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8812 to 5278. [2022-11-26 00:54:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5276 states have (on average 2.4450341167551177) internal successors, (12900), 5277 states have internal predecessors, (12900), 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) [2022-11-26 00:54:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 12900 transitions. [2022-11-26 00:54:20,717 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 12900 transitions. Word has length 98 [2022-11-26 00:54:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:54:20,718 INFO L495 AbstractCegarLoop]: Abstraction has 5278 states and 12900 transitions. [2022-11-26 00:54:20,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 5.212121212121212) internal successors, (172), 33 states have internal predecessors, (172), 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) [2022-11-26 00:54:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 12900 transitions. [2022-11-26 00:54:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:54:20,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:54:20,731 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:54:20,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:54:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 00:54:20,944 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:54:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:54:20,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1313140837, now seen corresponding path program 3 times [2022-11-26 00:54:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:54:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449925265] [2022-11-26 00:54:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:54:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:54:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:54:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:54:21,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:54:21,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449925265] [2022-11-26 00:54:21,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449925265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:54:21,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352498518] [2022-11-26 00:54:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:54:21,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:54:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:54:21,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:54:21,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:56:30,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:56:30,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:56:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:56:30,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 444 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:56:31,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352498518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:31,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492851844] [2022-11-26 00:56:31,155 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) [2022-11-26 00:56:31,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:31,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 40 [2022-11-26 00:56:31,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241579154] [2022-11-26 00:56:31,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:31,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:56:31,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:31,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:56:31,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1328, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:56:31,161 INFO L87 Difference]: Start difference. First operand 5278 states and 12900 transitions. Second operand has 42 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 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) [2022-11-26 00:56:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:32,563 INFO L93 Difference]: Finished difference Result 13484 states and 32148 transitions. [2022-11-26 00:56:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-26 00:56:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 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 116 [2022-11-26 00:56:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:32,608 INFO L225 Difference]: With dead ends: 13484 [2022-11-26 00:56:32,609 INFO L226 Difference]: Without dead ends: 13484 [2022-11-26 00:56:32,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1247, Invalid=4453, Unknown=0, NotChecked=0, Total=5700 [2022-11-26 00:56:32,611 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 677 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:32,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 46 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:56:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13484 states. [2022-11-26 00:56:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13484 to 7844. [2022-11-26 00:56:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7844 states, 7842 states have (on average 2.4835501147666412) internal successors, (19476), 7843 states have internal predecessors, (19476), 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) [2022-11-26 00:56:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7844 states to 7844 states and 19476 transitions. [2022-11-26 00:56:32,886 INFO L78 Accepts]: Start accepts. Automaton has 7844 states and 19476 transitions. Word has length 116 [2022-11-26 00:56:32,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:32,886 INFO L495 AbstractCegarLoop]: Abstraction has 7844 states and 19476 transitions. [2022-11-26 00:56:32,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 5.073170731707317) internal successors, (208), 41 states have internal predecessors, (208), 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) [2022-11-26 00:56:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7844 states and 19476 transitions. [2022-11-26 00:56:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-26 00:56:32,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:32,910 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:32,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:33,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:33,128 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:56:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:33,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1869640283, now seen corresponding path program 4 times [2022-11-26 00:56:33,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:33,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003620091] [2022-11-26 00:56:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:33,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:56:34,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003620091] [2022-11-26 00:56:34,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003620091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936139255] [2022-11-26 00:56:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:56:34,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:34,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:34,314 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:34,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:56:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:34,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:56:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:56:34,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:56:35,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936139255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:35,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212474240] [2022-11-26 00:56:35,454 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) [2022-11-26 00:56:35,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:35,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 42 [2022-11-26 00:56:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710630245] [2022-11-26 00:56:35,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:35,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 00:56:35,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 00:56:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1485, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:56:35,458 INFO L87 Difference]: Start difference. First operand 7844 states and 19476 transitions. Second operand has 44 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 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) [2022-11-26 00:56:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:37,065 INFO L93 Difference]: Finished difference Result 27300 states and 65846 transitions. [2022-11-26 00:56:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-26 00:56:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 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 133 [2022-11-26 00:56:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:37,163 INFO L225 Difference]: With dead ends: 27300 [2022-11-26 00:56:37,163 INFO L226 Difference]: Without dead ends: 27300 [2022-11-26 00:56:37,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1251, Invalid=4299, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:56:37,166 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 737 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:37,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 54 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:56:37,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27300 states. [2022-11-26 00:56:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27300 to 7852. [2022-11-26 00:56:37,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7852 states, 7850 states have (on average 2.5201273885350317) internal successors, (19783), 7851 states have internal predecessors, (19783), 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) [2022-11-26 00:56:37,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 19783 transitions. [2022-11-26 00:56:37,539 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 19783 transitions. Word has length 133 [2022-11-26 00:56:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:37,539 INFO L495 AbstractCegarLoop]: Abstraction has 7852 states and 19783 transitions. [2022-11-26 00:56:37,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 5.209302325581396) internal successors, (224), 43 states have internal predecessors, (224), 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) [2022-11-26 00:56:37,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 19783 transitions. [2022-11-26 00:56:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-26 00:56:37,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:37,602 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:37,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:37,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-26 00:56:37,803 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:56:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash 491651800, now seen corresponding path program 5 times [2022-11-26 00:56:37,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:37,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605072713] [2022-11-26 00:56:37,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 655 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:56:39,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:39,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605072713] [2022-11-26 00:56:39,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605072713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:39,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433101576] [2022-11-26 00:56:39,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:56:39,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:39,047 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:39,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:56:41,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-26 00:56:41,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:56:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:56:41,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:56:41,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433101576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:41,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [583794501] [2022-11-26 00:56:41,931 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) [2022-11-26 00:56:41,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:41,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 46 [2022-11-26 00:56:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39631012] [2022-11-26 00:56:41,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:41,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:56:41,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:56:41,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=1767, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:56:41,934 INFO L87 Difference]: Start difference. First operand 7852 states and 19783 transitions. Second operand has 48 states, 47 states have (on average 5.148936170212766) internal successors, (242), 47 states have internal predecessors, (242), 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) [2022-11-26 00:56:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:43,749 INFO L93 Difference]: Finished difference Result 24764 states and 59699 transitions. [2022-11-26 00:56:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-26 00:56:43,750 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.148936170212766) internal successors, (242), 47 states have internal predecessors, (242), 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 142 [2022-11-26 00:56:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:43,816 INFO L225 Difference]: With dead ends: 24764 [2022-11-26 00:56:43,816 INFO L226 Difference]: Without dead ends: 24764 [2022-11-26 00:56:43,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1654, Invalid=6002, Unknown=0, NotChecked=0, Total=7656 [2022-11-26 00:56:43,819 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 753 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:43,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 58 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:56:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24764 states. [2022-11-26 00:56:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24764 to 9000. [2022-11-26 00:56:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9000 states, 8998 states have (on average 2.5025561235830183) internal successors, (22518), 8999 states have internal predecessors, (22518), 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) [2022-11-26 00:56:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9000 states to 9000 states and 22518 transitions. [2022-11-26 00:56:44,242 INFO L78 Accepts]: Start accepts. Automaton has 9000 states and 22518 transitions. Word has length 142 [2022-11-26 00:56:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:44,243 INFO L495 AbstractCegarLoop]: Abstraction has 9000 states and 22518 transitions. [2022-11-26 00:56:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.148936170212766) internal successors, (242), 47 states have internal predecessors, (242), 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) [2022-11-26 00:56:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9000 states and 22518 transitions. [2022-11-26 00:56:44,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-26 00:56:44,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:44,266 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:44,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:44,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:56:44,476 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-26 00:56:44,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:44,477 INFO L85 PathProgramCache]: Analyzing trace with hash 593757685, now seen corresponding path program 6 times [2022-11-26 00:56:44,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:44,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020137319] [2022-11-26 00:56:44,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:44,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 0 proven. 663 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:56:45,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:45,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020137319] [2022-11-26 00:56:45,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020137319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:45,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798926576] [2022-11-26 00:56:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:56:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:45,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:45,919 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:45,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_910004e8-0218-4c48-a034-c453f0e190c8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process