./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --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-2329fc7 [2022-12-14 09:31:46,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:31:46,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:31:46,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:31:46,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:31:46,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:31:46,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:31:46,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:31:46,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:31:46,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:31:46,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:31:46,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:31:46,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:31:46,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:31:46,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:31:46,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:31:46,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:31:46,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:31:46,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:31:46,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:31:46,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:31:46,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:31:46,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:31:46,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:31:46,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:31:46,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:31:46,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:31:46,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:31:46,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:31:46,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:31:46,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:31:46,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:31:46,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:31:46,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:31:46,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:31:46,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:31:46,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:31:46,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:31:46,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:31:46,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:31:46,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:31:46,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:31:46,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:31:46,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:31:46,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:31:46,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:31:46,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:31:46,760 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:31:46,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:31:46,761 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:31:46,761 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:31:46,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:31:46,761 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:31:46,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:31:46,761 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:31:46,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:31:46,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:31:46,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:31:46,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:31:46,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:31:46,763 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_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-12-14 09:31:46,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:31:46,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:31:46,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:31:46,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:31:46,944 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:31:46,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-12-14 09:31:49,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:31:49,675 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:31:49,675 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/sv-benchmarks/c/pthread/stack_longer-1.i [2022-12-14 09:31:49,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/data/0be479aae/b28dd320474941eda40f5a69d6ac810e/FLAGb23d9a9f5 [2022-12-14 09:31:49,699 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/data/0be479aae/b28dd320474941eda40f5a69d6ac810e [2022-12-14 09:31:49,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:31:49,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:31:49,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:31:49,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:31:49,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:31:49,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:31:49" (1/1) ... [2022-12-14 09:31:49,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0e904e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:49, skipping insertion in model container [2022-12-14 09:31:49,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:31:49" (1/1) ... [2022-12-14 09:31:49,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:31:49,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:31:50,013 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_1c5e7440-7831-4738-9e12-843f9aafb816/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-12-14 09:31:50,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:31:50,039 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:31:50,068 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_1c5e7440-7831-4738-9e12-843f9aafb816/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-12-14 09:31:50,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:31:50,129 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:31:50,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50 WrapperNode [2022-12-14 09:31:50,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:31:50,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:31:50,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:31:50,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:31:50,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,184 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-12-14 09:31:50,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:31:50,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:31:50,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:31:50,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:31:50,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:31:50,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:31:50,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:31:50,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:31:50,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (1/1) ... [2022-12-14 09:31:50,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:31:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:31:50,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:31:50,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:31:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-14 09:31:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-14 09:31:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-14 09:31:50,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-14 09:31:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:31:50,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:31:50,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:31:50,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:31:50,286 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 09:31:50,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:31:50,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:31:50,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:31:50,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:31:50,288 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 09:31:50,404 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:31:50,406 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:31:50,629 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:31:50,638 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:31:50,638 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 09:31:50,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:31:50 BoogieIcfgContainer [2022-12-14 09:31:50,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:31:50,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:31:50,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:31:50,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:31:50,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:31:49" (1/3) ... [2022-12-14 09:31:50,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1993ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:31:50, skipping insertion in model container [2022-12-14 09:31:50,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:31:50" (2/3) ... [2022-12-14 09:31:50,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1993ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:31:50, skipping insertion in model container [2022-12-14 09:31:50,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:31:50" (3/3) ... [2022-12-14 09:31:50,649 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-12-14 09:31:50,656 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 09:31:50,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:31:50,664 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:31:50,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:31:50,754 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 09:31:50,786 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:31:50,799 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 179 transitions, 374 flow [2022-12-14 09:31:50,802 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 179 transitions, 374 flow [2022-12-14 09:31:50,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 374 flow [2022-12-14 09:31:50,872 INFO L130 PetriNetUnfolder]: 10/177 cut-off events. [2022-12-14 09:31:50,872 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 09:31:50,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 10/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 430 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-12-14 09:31:50,880 INFO L119 LiptonReduction]: Number of co-enabled transitions 9552 [2022-12-14 09:31:54,046 INFO L134 LiptonReduction]: Checked pairs total: 12409 [2022-12-14 09:31:54,047 INFO L136 LiptonReduction]: Total number of compositions: 173 [2022-12-14 09:31:54,053 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 36 transitions, 88 flow [2022-12-14 09:31:54,088 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 284 states, 281 states have (on average 2.697508896797153) internal successors, (758), 283 states have internal predecessors, (758), 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) [2022-12-14 09:31:54,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:31:54,109 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;@255e64ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:31:54,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 09:31:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 284 states, 281 states have (on average 2.697508896797153) internal successors, (758), 283 states have internal predecessors, (758), 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) [2022-12-14 09:31:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:31:54,117 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:54,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:31:54,118 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash 223692617, now seen corresponding path program 1 times [2022-12-14 09:31:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:54,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764642467] [2022-12-14 09:31:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:54,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764642467] [2022-12-14 09:31:54,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764642467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:54,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:54,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:31:54,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102222537] [2022-12-14 09:31:54,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:54,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:31:54,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:54,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:31:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:31:54,361 INFO L87 Difference]: Start difference. First operand has 284 states, 281 states have (on average 2.697508896797153) internal successors, (758), 283 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-12-14 09:31:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:54,455 INFO L93 Difference]: Finished difference Result 502 states and 1336 transitions. [2022-12-14 09:31:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:31:54,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-12-14 09:31:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:54,468 INFO L225 Difference]: With dead ends: 502 [2022-12-14 09:31:54,468 INFO L226 Difference]: Without dead ends: 502 [2022-12-14 09:31:54,468 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 [2022-12-14 09:31:54,470 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:54,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:31:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-12-14 09:31:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 372. [2022-12-14 09:31:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 369 states have (on average 2.7913279132791327) internal successors, (1030), 371 states have internal predecessors, (1030), 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) [2022-12-14 09:31:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1030 transitions. [2022-12-14 09:31:54,519 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1030 transitions. Word has length 6 [2022-12-14 09:31:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:54,519 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 1030 transitions. [2022-12-14 09:31:54,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-12-14 09:31:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1030 transitions. [2022-12-14 09:31:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:31:54,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:54,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:31:54,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1088601971, now seen corresponding path program 1 times [2022-12-14 09:31:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:54,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095034318] [2022-12-14 09:31:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:54,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:54,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095034318] [2022-12-14 09:31:54,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095034318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:54,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:54,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:31:54,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716304058] [2022-12-14 09:31:54,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:54,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:31:54,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:54,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:31:54,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:31:54,632 INFO L87 Difference]: Start difference. First operand 372 states and 1030 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) [2022-12-14 09:31:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:54,687 INFO L93 Difference]: Finished difference Result 450 states and 1202 transitions. [2022-12-14 09:31:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:31:54,688 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 [2022-12-14 09:31:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:54,691 INFO L225 Difference]: With dead ends: 450 [2022-12-14 09:31:54,691 INFO L226 Difference]: Without dead ends: 432 [2022-12-14 09:31:54,691 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 [2022-12-14 09:31:54,692 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:54,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:31:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-12-14 09:31:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 416. [2022-12-14 09:31:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 412 states have (on average 2.762135922330097) internal successors, (1138), 415 states have internal predecessors, (1138), 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) [2022-12-14 09:31:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1138 transitions. [2022-12-14 09:31:54,717 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1138 transitions. Word has length 8 [2022-12-14 09:31:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:54,718 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1138 transitions. [2022-12-14 09:31:54,718 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) [2022-12-14 09:31:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1138 transitions. [2022-12-14 09:31:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:31:54,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:54,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:54,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:31:54,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:54,720 INFO L85 PathProgramCache]: Analyzing trace with hash 227972828, now seen corresponding path program 1 times [2022-12-14 09:31:54,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:54,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125430564] [2022-12-14 09:31:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:54,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:54,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:54,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125430564] [2022-12-14 09:31:54,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125430564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:54,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:54,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:31:54,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096806340] [2022-12-14 09:31:54,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:31:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:31:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:31:54,791 INFO L87 Difference]: Start difference. First operand 416 states and 1138 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:31:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:54,856 INFO L93 Difference]: Finished difference Result 446 states and 1219 transitions. [2022-12-14 09:31:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:31:54,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 09:31:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:54,859 INFO L225 Difference]: With dead ends: 446 [2022-12-14 09:31:54,859 INFO L226 Difference]: Without dead ends: 446 [2022-12-14 09:31:54,860 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 [2022-12-14 09:31:54,861 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:54,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:31:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-12-14 09:31:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2022-12-14 09:31:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 443 states have (on average 2.7516930022573365) internal successors, (1219), 445 states have internal predecessors, (1219), 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) [2022-12-14 09:31:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1219 transitions. [2022-12-14 09:31:54,878 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1219 transitions. Word has length 10 [2022-12-14 09:31:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:54,879 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1219 transitions. [2022-12-14 09:31:54,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:31:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1219 transitions. [2022-12-14 09:31:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:31:54,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:54,880 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:54,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:31:54,881 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:54,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1545875594, now seen corresponding path program 1 times [2022-12-14 09:31:54,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:54,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253782335] [2022-12-14 09:31:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:54,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:54,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:54,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253782335] [2022-12-14 09:31:54,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253782335] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:31:54,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419649688] [2022-12-14 09:31:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:54,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:31:54,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:31:54,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:31:54,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:31:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:31:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:31:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:55,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:31:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419649688] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:31:55,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116350467] [2022-12-14 09:31:55,148 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) [2022-12-14 09:31:55,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:31:55,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-14 09:31:55,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237411447] [2022-12-14 09:31:55,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:31:55,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:31:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:55,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:31:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:31:55,151 INFO L87 Difference]: Start difference. First operand 446 states and 1219 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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) [2022-12-14 09:31:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:55,459 INFO L93 Difference]: Finished difference Result 1090 states and 2879 transitions. [2022-12-14 09:31:55,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:31:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:31:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:55,465 INFO L225 Difference]: With dead ends: 1090 [2022-12-14 09:31:55,466 INFO L226 Difference]: Without dead ends: 1090 [2022-12-14 09:31:55,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:31:55,467 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 161 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:55,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 0 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:31:55,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-12-14 09:31:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 798. [2022-12-14 09:31:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 795 states have (on average 2.762264150943396) internal successors, (2196), 797 states have internal predecessors, (2196), 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) [2022-12-14 09:31:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2196 transitions. [2022-12-14 09:31:55,493 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2196 transitions. Word has length 14 [2022-12-14 09:31:55,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:55,493 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 2196 transitions. [2022-12-14 09:31:55,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 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) [2022-12-14 09:31:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2196 transitions. [2022-12-14 09:31:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:31:55,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:55,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:55,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:31:55,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:31:55,695 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:55,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1843817569, now seen corresponding path program 1 times [2022-12-14 09:31:55,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:55,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659207201] [2022-12-14 09:31:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:55,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:55,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:55,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659207201] [2022-12-14 09:31:55,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659207201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:55,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:55,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:31:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009155920] [2022-12-14 09:31:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:55,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:31:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:31:55,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:31:55,769 INFO L87 Difference]: Start difference. First operand 798 states and 2196 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-12-14 09:31:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:55,818 INFO L93 Difference]: Finished difference Result 342 states and 792 transitions. [2022-12-14 09:31:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:31:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2022-12-14 09:31:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:55,820 INFO L225 Difference]: With dead ends: 342 [2022-12-14 09:31:55,820 INFO L226 Difference]: Without dead ends: 338 [2022-12-14 09:31:55,820 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 [2022-12-14 09:31:55,821 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:55,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:31:55,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-14 09:31:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 306. [2022-12-14 09:31:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 304 states have (on average 2.3026315789473686) internal successors, (700), 305 states have internal predecessors, (700), 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) [2022-12-14 09:31:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 700 transitions. [2022-12-14 09:31:55,828 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 700 transitions. Word has length 16 [2022-12-14 09:31:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:55,828 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 700 transitions. [2022-12-14 09:31:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2022-12-14 09:31:55,829 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 700 transitions. [2022-12-14 09:31:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:31:55,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:55,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:55,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:31:55,830 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:55,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1918265247, now seen corresponding path program 1 times [2022-12-14 09:31:55,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:55,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481130206] [2022-12-14 09:31:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:55,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:55,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:55,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481130206] [2022-12-14 09:31:55,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481130206] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:55,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:55,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:31:55,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450822558] [2022-12-14 09:31:55,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:55,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:31:55,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:31:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:31:55,893 INFO L87 Difference]: Start difference. First operand 306 states and 700 transitions. Second operand has 5 states, 5 states have (on average 3.4) 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) [2022-12-14 09:31:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:55,990 INFO L93 Difference]: Finished difference Result 432 states and 982 transitions. [2022-12-14 09:31:55,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:31:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) 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 [2022-12-14 09:31:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:55,992 INFO L225 Difference]: With dead ends: 432 [2022-12-14 09:31:55,992 INFO L226 Difference]: Without dead ends: 432 [2022-12-14 09:31:55,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:31:55,993 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:55,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:31:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-12-14 09:31:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 340. [2022-12-14 09:31:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 2.3136094674556213) internal successors, (782), 339 states have internal predecessors, (782), 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) [2022-12-14 09:31:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 782 transitions. [2022-12-14 09:31:56,005 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 782 transitions. Word has length 17 [2022-12-14 09:31:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:56,005 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 782 transitions. [2022-12-14 09:31:56,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) 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) [2022-12-14 09:31:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 782 transitions. [2022-12-14 09:31:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:31:56,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:56,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:56,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:31:56,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:56,007 INFO L85 PathProgramCache]: Analyzing trace with hash 182714209, now seen corresponding path program 1 times [2022-12-14 09:31:56,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:56,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139155529] [2022-12-14 09:31:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:56,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:56,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139155529] [2022-12-14 09:31:56,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139155529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:56,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:56,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:31:56,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307668162] [2022-12-14 09:31:56,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:56,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:31:56,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:31:56,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:31:56,541 INFO L87 Difference]: Start difference. First operand 340 states and 782 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-12-14 09:31:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:56,932 INFO L93 Difference]: Finished difference Result 554 states and 1262 transitions. [2022-12-14 09:31:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:31:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2022-12-14 09:31:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:56,935 INFO L225 Difference]: With dead ends: 554 [2022-12-14 09:31:56,935 INFO L226 Difference]: Without dead ends: 554 [2022-12-14 09:31:56,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:31:56,936 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:56,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:31:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-12-14 09:31:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 460. [2022-12-14 09:31:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 458 states have (on average 2.3799126637554586) internal successors, (1090), 459 states have internal predecessors, (1090), 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) [2022-12-14 09:31:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1090 transitions. [2022-12-14 09:31:56,951 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1090 transitions. Word has length 21 [2022-12-14 09:31:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:56,952 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 1090 transitions. [2022-12-14 09:31:56,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-12-14 09:31:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1090 transitions. [2022-12-14 09:31:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:31:56,953 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:56,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:31:56,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 214018507, now seen corresponding path program 2 times [2022-12-14 09:31:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:56,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99167109] [2022-12-14 09:31:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:57,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:57,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99167109] [2022-12-14 09:31:57,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99167109] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:57,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:57,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 09:31:57,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785856153] [2022-12-14 09:31:57,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:57,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:31:57,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:57,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:31:57,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:31:57,728 INFO L87 Difference]: Start difference. First operand 460 states and 1090 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2022-12-14 09:31:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:58,490 INFO L93 Difference]: Finished difference Result 666 states and 1547 transitions. [2022-12-14 09:31:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:31:58,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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 [2022-12-14 09:31:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:58,494 INFO L225 Difference]: With dead ends: 666 [2022-12-14 09:31:58,494 INFO L226 Difference]: Without dead ends: 666 [2022-12-14 09:31:58,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:31:58,495 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:58,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:31:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-12-14 09:31:58,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 546. [2022-12-14 09:31:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 544 states have (on average 2.3786764705882355) internal successors, (1294), 545 states have internal predecessors, (1294), 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) [2022-12-14 09:31:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1294 transitions. [2022-12-14 09:31:58,512 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1294 transitions. Word has length 21 [2022-12-14 09:31:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:58,512 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 1294 transitions. [2022-12-14 09:31:58,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2022-12-14 09:31:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1294 transitions. [2022-12-14 09:31:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:31:58,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:58,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:58,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:31:58,514 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:58,514 INFO L85 PathProgramCache]: Analyzing trace with hash 262150533, now seen corresponding path program 3 times [2022-12-14 09:31:58,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:58,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60576440] [2022-12-14 09:31:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:58,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:31:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:31:59,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:31:59,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60576440] [2022-12-14 09:31:59,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60576440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:31:59,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:31:59,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:31:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32111474] [2022-12-14 09:31:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:31:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:31:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:31:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:31:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:31:59,020 INFO L87 Difference]: Start difference. First operand 546 states and 1294 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-12-14 09:31:59,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:31:59,467 INFO L93 Difference]: Finished difference Result 748 states and 1742 transitions. [2022-12-14 09:31:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:31:59,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2022-12-14 09:31:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:31:59,471 INFO L225 Difference]: With dead ends: 748 [2022-12-14 09:31:59,471 INFO L226 Difference]: Without dead ends: 748 [2022-12-14 09:31:59,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:31:59,472 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 95 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:31:59,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 0 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:31:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-12-14 09:31:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 479. [2022-12-14 09:31:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 477 states have (on average 2.408805031446541) internal successors, (1149), 478 states have internal predecessors, (1149), 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) [2022-12-14 09:31:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1149 transitions. [2022-12-14 09:31:59,488 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1149 transitions. Word has length 21 [2022-12-14 09:31:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:31:59,489 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 1149 transitions. [2022-12-14 09:31:59,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-12-14 09:31:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1149 transitions. [2022-12-14 09:31:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:31:59,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:31:59,490 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:59,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:31:59,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-14 09:31:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:31:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1516716651, now seen corresponding path program 1 times [2022-12-14 09:31:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:31:59,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289665239] [2022-12-14 09:31:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:31:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:31:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:31:59,525 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 09:31:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 09:31:59,575 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 09:31:59,575 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 09:31:59,576 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-14 09:31:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-14 09:31:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-14 09:31:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-14 09:31:59,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-14 09:31:59,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-14 09:31:59,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:31:59,581 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:31:59,585 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-14 09:31:59,585 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 09:31:59,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 09:31:59 BasicIcfg [2022-12-14 09:31:59,621 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 09:31:59,622 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 09:31:59,622 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 09:31:59,622 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 09:31:59,622 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:31:50" (3/4) ... [2022-12-14 09:31:59,624 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 09:31:59,668 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 09:31:59,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 09:31:59,669 INFO L158 Benchmark]: Toolchain (without parser) took 9966.58ms. Allocated memory was 211.8MB in the beginning and 308.3MB in the end (delta: 96.5MB). Free memory was 180.4MB in the beginning and 247.3MB in the end (delta: -66.9MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2022-12-14 09:31:59,669 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:31:59,670 INFO L158 Benchmark]: CACSL2BoogieTranslator took 425.81ms. Allocated memory is still 211.8MB. Free memory was 180.2MB in the beginning and 156.0MB in the end (delta: 24.2MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. [2022-12-14 09:31:59,670 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.95ms. Allocated memory is still 211.8MB. Free memory was 156.0MB in the beginning and 153.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:31:59,670 INFO L158 Benchmark]: Boogie Preprocessor took 34.96ms. Allocated memory is still 211.8MB. Free memory was 153.5MB in the beginning and 151.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 09:31:59,671 INFO L158 Benchmark]: RCFGBuilder took 420.02ms. Allocated memory is still 211.8MB. Free memory was 151.9MB in the beginning and 133.8MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 09:31:59,671 INFO L158 Benchmark]: TraceAbstraction took 8978.17ms. Allocated memory was 211.8MB in the beginning and 308.3MB in the end (delta: 96.5MB). Free memory was 133.0MB in the beginning and 256.7MB in the end (delta: -123.7MB). Peak memory consumption was 102.3MB. Max. memory is 16.1GB. [2022-12-14 09:31:59,671 INFO L158 Benchmark]: Witness Printer took 46.79ms. Allocated memory is still 308.3MB. Free memory was 256.7MB in the beginning and 247.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:31:59,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 113.2MB. Free memory is still 78.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 425.81ms. Allocated memory is still 211.8MB. Free memory was 180.2MB in the beginning and 156.0MB in the end (delta: 24.2MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.95ms. Allocated memory is still 211.8MB. Free memory was 156.0MB in the beginning and 153.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.96ms. Allocated memory is still 211.8MB. Free memory was 153.5MB in the beginning and 151.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 420.02ms. Allocated memory is still 211.8MB. Free memory was 151.9MB in the beginning and 133.8MB in the end (delta: 18.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 8978.17ms. Allocated memory was 211.8MB in the beginning and 308.3MB in the end (delta: 96.5MB). Free memory was 133.0MB in the beginning and 256.7MB in the end (delta: -123.7MB). Peak memory consumption was 102.3MB. Max. memory is 16.1GB. * Witness Printer took 46.79ms. Allocated memory is still 308.3MB. Free memory was 256.7MB in the beginning and 247.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 176 PlacesBefore, 38 PlacesAfterwards, 179 TransitionsBefore, 36 TransitionsAfterwards, 9552 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 105 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 26 ConcurrentYvCompositions, 5 ChoiceCompositions, 173 TotalNumberOfCompositions, 12409 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9984, independent: 9805, independent conditional: 0, independent unconditional: 9805, dependent: 179, dependent conditional: 0, dependent unconditional: 179, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7123, independent: 7041, independent conditional: 0, independent unconditional: 7041, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7123, independent: 7016, independent conditional: 0, independent unconditional: 7016, dependent: 107, dependent conditional: 0, dependent unconditional: 107, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 107, independent: 25, independent conditional: 0, independent unconditional: 25, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 166, independent: 32, independent conditional: 0, independent unconditional: 32, dependent: 134, dependent conditional: 0, dependent unconditional: 134, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9984, independent: 2764, independent conditional: 0, independent unconditional: 2764, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 7123, unknown conditional: 0, unknown unconditional: 7123] , Statistics on independence cache: Total cache size (in pairs): 274, Positive cache size: 250, Positive conditional cache size: 0, Positive unconditional cache size: 250, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x VAL [\old(x)=399, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=399] [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=399, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=399, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 529 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 529 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2689 IncrementalHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 0 mSDtfsCounter, 2689 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=798occurred in iteration=4, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 1045 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 172 NumberOfCodeBlocks, 172 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 151 ConstructedInterpolants, 0 QuantifiedInterpolants, 1818 SizeOfPredicates, 1 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 3/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 09:31:59,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c5e7440-7831-4738-9e12-843f9aafb816/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE