./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta --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 ce64fcfa63b9df647c320ea90e20b624e2dad5b9ca256083b6d2f56c3177560a --- 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-dbf71c6-m [2022-10-17 17:42:34,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:42:34,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:42:34,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:42:34,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:42:34,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:42:34,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:42:34,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:42:34,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:42:34,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:42:34,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:42:34,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:42:34,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:42:34,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:42:34,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:42:34,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:42:34,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:42:34,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:42:34,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:42:34,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:42:34,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:42:34,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:42:34,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:42:34,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:42:34,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:42:34,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:42:34,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:42:34,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:42:34,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:42:34,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:42:34,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:42:34,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:42:34,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:42:34,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:42:34,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:42:34,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:42:34,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:42:34,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:42:34,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:42:34,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:42:34,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:42:34,151 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:42:34,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:42:34,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:42:34,184 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:42:34,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:42:34,185 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:42:34,185 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:42:34,186 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:42:34,186 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:42:34,186 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:42:34,186 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:42:34,186 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:42:34,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:42:34,187 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:42:34,187 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:42:34,187 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:42:34,187 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:42:34,187 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:42:34,188 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:42:34,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:42:34,189 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:42:34,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:42:34,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:42:34,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:42:34,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:42:34,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:42:34,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:42:34,190 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:42:34,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:42:34,190 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:42:34,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:42:34,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:42:34,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:42:34,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:34,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:42:34,191 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:42:34,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:42:34,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:42:34,192 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:42:34,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:42:34,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:42:34,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:42:34,193 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_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce64fcfa63b9df647c320ea90e20b624e2dad5b9ca256083b6d2f56c3177560a [2022-10-17 17:42:34,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:42:34,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:42:34,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:42:34,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:42:34,506 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:42:34,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i [2022-10-17 17:42:34,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/data/5ecbe26c2/8e568ab072984bf999e16cb7fd56ca96/FLAG9cf652499 [2022-10-17 17:42:35,114 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:42:35,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i [2022-10-17 17:42:35,131 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/data/5ecbe26c2/8e568ab072984bf999e16cb7fd56ca96/FLAG9cf652499 [2022-10-17 17:42:35,413 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/data/5ecbe26c2/8e568ab072984bf999e16cb7fd56ca96 [2022-10-17 17:42:35,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:42:35,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:42:35,425 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:35,425 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:42:35,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:42:35,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:35" (1/1) ... [2022-10-17 17:42:35,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64f899c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:35, skipping insertion in model container [2022-10-17 17:42:35,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:35" (1/1) ... [2022-10-17 17:42:35,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:42:35,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:42:35,914 WARN L230 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_8f612498-3da1-49e8-b699-08758836985a/sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i[30297,30310] [2022-10-17 17:42:35,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:35,943 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:42:35,998 WARN L230 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_8f612498-3da1-49e8-b699-08758836985a/sv-benchmarks/c/pthread-ext/27_Boop_simple_vf.i[30297,30310] [2022-10-17 17:42:36,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:36,061 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:42:36,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36 WrapperNode [2022-10-17 17:42:36,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:36,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:36,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:42:36,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:42:36,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,131 INFO L138 Inliner]: procedures = 170, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-10-17 17:42:36,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:36,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:42:36,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:42:36,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:42:36,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:42:36,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:42:36,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:42:36,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:42:36,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (1/1) ... [2022-10-17 17:42:36,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:36,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:36,237 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:42:36,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f612498-3da1-49e8-b699-08758836985a/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:42:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2022-10-17 17:42:36,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2022-10-17 17:42:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-10-17 17:42:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-10-17 17:42:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:42:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:42:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:42:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:42:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:42:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:42:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:42:36,290 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 17:42:36,484 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:42:36,486 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:42:36,674 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:42:36,681 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:42:36,682 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 17:42:36,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:36 BoogieIcfgContainer [2022-10-17 17:42:36,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:42:36,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:42:36,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:42:36,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:42:36,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:42:35" (1/3) ... [2022-10-17 17:42:36,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37078b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:36, skipping insertion in model container [2022-10-17 17:42:36,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:36" (2/3) ... [2022-10-17 17:42:36,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37078b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:42:36, skipping insertion in model container [2022-10-17 17:42:36,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:42:36" (3/3) ... [2022-10-17 17:42:36,694 INFO L112 eAbstractionObserver]: Analyzing ICFG 27_Boop_simple_vf.i [2022-10-17 17:42:36,703 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 17:42:36,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:42:36,714 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:42:36,714 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 17:42:36,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:42:36,810 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:42:36,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 91 transitions, 192 flow [2022-10-17 17:42:36,829 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 91 transitions, 192 flow [2022-10-17 17:42:36,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 91 transitions, 192 flow [2022-10-17 17:42:36,965 INFO L130 PetriNetUnfolder]: 13/101 cut-off events. [2022-10-17 17:42:36,966 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 17:42:36,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 101 events. 13/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 232 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2022-10-17 17:42:36,977 INFO L118 LiptonReduction]: Number of co-enabled transitions 2598 [2022-10-17 17:42:39,234 INFO L133 LiptonReduction]: Checked pairs total: 2866 [2022-10-17 17:42:39,235 INFO L135 LiptonReduction]: Total number of compositions: 82 [2022-10-17 17:42:39,244 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 26 transitions, 62 flow [2022-10-17 17:42:39,309 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 257 states, 253 states have (on average 3.1185770750988144) internal successors, (789), 256 states have internal predecessors, (789), 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) [2022-10-17 17:42:39,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:42:39,338 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;@4be8a2c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:42:39,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 17:42:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 257 states, 253 states have (on average 3.1185770750988144) internal successors, (789), 256 states have internal predecessors, (789), 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) [2022-10-17 17:42:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:42:39,349 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:39,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:39,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:42:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1898389119, now seen corresponding path program 1 times [2022-10-17 17:42:39,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:39,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111222865] [2022-10-17 17:42:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:39,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:39,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:39,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111222865] [2022-10-17 17:42:39,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111222865] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:39,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:39,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:42:39,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591592745] [2022-10-17 17:42:39,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:39,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:39,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:39,608 INFO L87 Difference]: Start difference. First operand has 257 states, 253 states have (on average 3.1185770750988144) internal successors, (789), 256 states have internal predecessors, (789), 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 2.6666666666666665) 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) [2022-10-17 17:42:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:39,665 INFO L93 Difference]: Finished difference Result 130 states and 329 transitions. [2022-10-17 17:42:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:39,669 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 [2022-10-17 17:42:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:39,679 INFO L225 Difference]: With dead ends: 130 [2022-10-17 17:42:39,679 INFO L226 Difference]: Without dead ends: 130 [2022-10-17 17:42:39,680 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 [2022-10-17 17:42:39,684 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:39,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:39,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-10-17 17:42:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-10-17 17:42:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 2.5703125) internal successors, (329), 129 states have internal predecessors, (329), 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) [2022-10-17 17:42:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 329 transitions. [2022-10-17 17:42:39,736 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 329 transitions. Word has length 8 [2022-10-17 17:42:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:39,736 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 329 transitions. [2022-10-17 17:42:39,737 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) [2022-10-17 17:42:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 329 transitions. [2022-10-17 17:42:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:42:39,738 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:39,738 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:42:39,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 17:42:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1247793271, now seen corresponding path program 1 times [2022-10-17 17:42:39,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:39,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618730305] [2022-10-17 17:42:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:39,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:39,769 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:42:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:39,808 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:42:39,808 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:42:39,810 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 17:42:39,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 17:42:39,812 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-10-17 17:42:39,813 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 17:42:39,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:42:39,815 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 17:42:39,817 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:42:39,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 17:42:39,841 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:42:39,845 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:42:39,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 144 transitions, 312 flow [2022-10-17 17:42:39,846 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 144 transitions, 312 flow [2022-10-17 17:42:39,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 144 transitions, 312 flow [2022-10-17 17:42:39,881 INFO L130 PetriNetUnfolder]: 17/127 cut-off events. [2022-10-17 17:42:39,881 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 17:42:39,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 127 events. 17/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 302 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 136. Up to 6 conditions per place. [2022-10-17 17:42:39,892 INFO L118 LiptonReduction]: Number of co-enabled transitions 4260 [2022-10-17 17:42:43,159 INFO L133 LiptonReduction]: Checked pairs total: 8172 [2022-10-17 17:42:43,160 INFO L135 LiptonReduction]: Total number of compositions: 138 [2022-10-17 17:42:43,161 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 44 transitions, 112 flow [2022-10-17 17:42:43,325 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2218 states, 2210 states have (on average 4.221266968325792) internal successors, (9329), 2217 states have internal predecessors, (9329), 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) [2022-10-17 17:42:43,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:42:43,336 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;@4be8a2c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:42:43,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 17:42:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 2218 states, 2210 states have (on average 4.221266968325792) internal successors, (9329), 2217 states have internal predecessors, (9329), 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) [2022-10-17 17:42:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:42:43,349 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:43,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:43,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-10-17 17:42:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash -965345961, now seen corresponding path program 1 times [2022-10-17 17:42:43,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:43,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075752923] [2022-10-17 17:42:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:43,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:43,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075752923] [2022-10-17 17:42:43,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075752923] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:43,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:43,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:42:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784603245] [2022-10-17 17:42:43,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:43,494 INFO L87 Difference]: Start difference. First operand has 2218 states, 2210 states have (on average 4.221266968325792) internal successors, (9329), 2217 states have internal predecessors, (9329), 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 2.6666666666666665) 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) [2022-10-17 17:42:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:43,597 INFO L93 Difference]: Finished difference Result 1365 states and 4966 transitions. [2022-10-17 17:42:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:43,598 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 [2022-10-17 17:42:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:43,631 INFO L225 Difference]: With dead ends: 1365 [2022-10-17 17:42:43,631 INFO L226 Difference]: Without dead ends: 1365 [2022-10-17 17:42:43,632 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 [2022-10-17 17:42:43,636 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:43,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-10-17 17:42:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1365. [2022-10-17 17:42:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1363 states have (on average 3.6434336023477623) internal successors, (4966), 1364 states have internal predecessors, (4966), 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) [2022-10-17 17:42:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 4966 transitions. [2022-10-17 17:42:43,755 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 4966 transitions. Word has length 8 [2022-10-17 17:42:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:43,755 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 4966 transitions. [2022-10-17 17:42:43,756 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) [2022-10-17 17:42:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 4966 transitions. [2022-10-17 17:42:43,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:42:43,759 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:43,759 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:43,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:42:43,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-10-17 17:42:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1322513687, now seen corresponding path program 1 times [2022-10-17 17:42:43,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:43,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346345387] [2022-10-17 17:42:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:43,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:43,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:42:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:43,802 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:42:43,803 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:42:43,803 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-10-17 17:42:43,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-10-17 17:42:43,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-10-17 17:42:43,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-10-17 17:42:43,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-10-17 17:42:43,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:42:43,805 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 17:42:43,805 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:42:43,805 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 17:42:43,834 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:42:43,843 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:42:43,844 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 197 transitions, 436 flow [2022-10-17 17:42:43,844 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 197 transitions, 436 flow [2022-10-17 17:42:43,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 197 transitions, 436 flow [2022-10-17 17:42:43,901 INFO L130 PetriNetUnfolder]: 21/153 cut-off events. [2022-10-17 17:42:43,901 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 17:42:43,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 153 events. 21/153 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 360 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 167. Up to 8 conditions per place. [2022-10-17 17:42:43,914 INFO L118 LiptonReduction]: Number of co-enabled transitions 6234 [2022-10-17 17:42:47,576 INFO L133 LiptonReduction]: Checked pairs total: 13814 [2022-10-17 17:42:47,577 INFO L135 LiptonReduction]: Total number of compositions: 189 [2022-10-17 17:42:47,578 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 59 transitions, 160 flow [2022-10-17 17:42:48,474 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13342 states, 13336 states have (on average 5.386322735452909) internal successors, (71832), 13341 states have internal predecessors, (71832), 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) [2022-10-17 17:42:48,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:42:48,480 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;@4be8a2c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:42:48,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 17:42:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 13342 states, 13336 states have (on average 5.386322735452909) internal successors, (71832), 13341 states have internal predecessors, (71832), 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) [2022-10-17 17:42:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:42:48,515 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:48,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:48,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:42:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1151712167, now seen corresponding path program 1 times [2022-10-17 17:42:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:48,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205369422] [2022-10-17 17:42:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:48,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:48,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:48,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205369422] [2022-10-17 17:42:48,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205369422] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:48,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:48,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:42:48,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044394907] [2022-10-17 17:42:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:48,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:42:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:42:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:42:48,629 INFO L87 Difference]: Start difference. First operand has 13342 states, 13336 states have (on average 5.386322735452909) internal successors, (71832), 13341 states have internal predecessors, (71832), 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 2.6666666666666665) 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) [2022-10-17 17:42:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:48,983 INFO L93 Difference]: Finished difference Result 9537 states and 45367 transitions. [2022-10-17 17:42:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:42:48,989 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 [2022-10-17 17:42:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:49,169 INFO L225 Difference]: With dead ends: 9537 [2022-10-17 17:42:49,169 INFO L226 Difference]: Without dead ends: 9537 [2022-10-17 17:42:49,170 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 [2022-10-17 17:42:49,171 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:49,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:42:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9537 states. [2022-10-17 17:42:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9537 to 9537. [2022-10-17 17:42:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9537 states, 9535 states have (on average 4.757944415312008) internal successors, (45367), 9536 states have internal predecessors, (45367), 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) [2022-10-17 17:42:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9537 states to 9537 states and 45367 transitions. [2022-10-17 17:42:50,178 INFO L78 Accepts]: Start accepts. Automaton has 9537 states and 45367 transitions. Word has length 8 [2022-10-17 17:42:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:50,178 INFO L495 AbstractCegarLoop]: Abstraction has 9537 states and 45367 transitions. [2022-10-17 17:42:50,179 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) [2022-10-17 17:42:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9537 states and 45367 transitions. [2022-10-17 17:42:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:42:50,188 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:50,189 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:42:50,189 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:42:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 698042031, now seen corresponding path program 1 times [2022-10-17 17:42:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:50,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100503939] [2022-10-17 17:42:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:42:50,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:42:50,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100503939] [2022-10-17 17:42:50,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100503939] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:42:50,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:42:50,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:42:50,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636397958] [2022-10-17 17:42:50,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:42:50,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:42:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:42:50,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:42:50,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:42:50,568 INFO L87 Difference]: Start difference. First operand 9537 states and 45367 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:42:51,638 INFO L93 Difference]: Finished difference Result 22851 states and 107635 transitions. [2022-10-17 17:42:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:42:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-17 17:42:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:42:52,109 INFO L225 Difference]: With dead ends: 22851 [2022-10-17 17:42:52,109 INFO L226 Difference]: Without dead ends: 22851 [2022-10-17 17:42:52,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:42:52,111 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 106 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:42:52,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 205 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:42:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22851 states. [2022-10-17 17:42:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22851 to 19395. [2022-10-17 17:42:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19395 states, 19393 states have (on average 4.789975764451091) internal successors, (92892), 19394 states have internal predecessors, (92892), 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) [2022-10-17 17:42:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19395 states to 19395 states and 92892 transitions. [2022-10-17 17:42:53,964 INFO L78 Accepts]: Start accepts. Automaton has 19395 states and 92892 transitions. Word has length 18 [2022-10-17 17:42:53,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:42:53,966 INFO L495 AbstractCegarLoop]: Abstraction has 19395 states and 92892 transitions. [2022-10-17 17:42:53,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:42:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19395 states and 92892 transitions. [2022-10-17 17:42:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:42:53,972 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:42:53,972 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:42:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:42:53,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 17:42:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:42:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash -253999658, now seen corresponding path program 1 times [2022-10-17 17:42:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:42:53,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413756504] [2022-10-17 17:42:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:42:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:42:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:54,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:42:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:42:54,045 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:42:54,046 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:42:54,046 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-10-17 17:42:54,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-10-17 17:42:54,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-10-17 17:42:54,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-10-17 17:42:54,047 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-10-17 17:42:54,048 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-10-17 17:42:54,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:42:54,048 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 17:42:54,050 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 17:42:54,050 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 17:42:54,265 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 17:42:54,267 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-10-17 17:42:54,267 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 250 transitions, 564 flow [2022-10-17 17:42:54,267 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 250 transitions, 564 flow [2022-10-17 17:42:54,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 250 transitions, 564 flow [2022-10-17 17:42:54,304 INFO L130 PetriNetUnfolder]: 25/179 cut-off events. [2022-10-17 17:42:54,304 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-10-17 17:42:54,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 179 events. 25/179 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 413 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 199. Up to 10 conditions per place. [2022-10-17 17:42:54,322 INFO L118 LiptonReduction]: Number of co-enabled transitions 8520 [2022-10-17 17:42:58,852 INFO L133 LiptonReduction]: Checked pairs total: 18756 [2022-10-17 17:42:58,852 INFO L135 LiptonReduction]: Total number of compositions: 245 [2022-10-17 17:42:58,853 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 75 places, 74 transitions, 212 flow [2022-10-17 17:43:03,019 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 80086 states, 80079 states have (on average 6.549282583448845) internal successors, (524460), 80085 states have internal predecessors, (524460), 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) [2022-10-17 17:43:03,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:43:03,021 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;@4be8a2c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:43:03,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-10-17 17:43:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 80086 states, 80079 states have (on average 6.549282583448845) internal successors, (524460), 80085 states have internal predecessors, (524460), 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) [2022-10-17 17:43:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:43:03,188 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:03,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:03,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-10-17 17:43:03,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1277983784, now seen corresponding path program 1 times [2022-10-17 17:43:03,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316334410] [2022-10-17 17:43:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:43:03,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:03,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316334410] [2022-10-17 17:43:03,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316334410] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:03,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:03,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:43:03,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094179529] [2022-10-17 17:43:03,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:03,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:03,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:03,396 INFO L87 Difference]: Start difference. First operand has 80086 states, 80079 states have (on average 6.549282583448845) internal successors, (524460), 80085 states have internal predecessors, (524460), 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 2.6666666666666665) 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)