./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS --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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --- 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-8393723 [2022-11-19 06:50:28,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:50:28,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:50:28,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:50:28,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:50:28,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:50:28,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:50:28,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:50:28,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:50:28,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:50:28,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:50:28,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:50:28,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:50:28,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:50:28,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:50:28,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:50:28,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:50:28,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:50:28,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:50:28,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:50:28,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:50:28,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:50:28,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:50:28,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:50:28,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:50:28,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:50:28,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:50:28,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:50:28,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:50:28,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:50:28,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:50:28,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:50:28,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:50:28,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:50:28,137 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:50:28,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:50:28,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:50:28,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:50:28,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:50:28,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:50:28,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:50:28,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:50:28,191 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:50:28,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:50:28,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:50:28,193 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:50:28,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:50:28,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:50:28,194 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:50:28,194 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:50:28,194 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:50:28,194 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:50:28,195 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:50:28,196 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:50:28,196 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:50:28,196 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:50:28,196 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:50:28,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:50:28,196 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:50:28,197 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:50:28,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:50:28,197 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:50:28,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:50:28,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:50:28,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:50:28,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:50:28,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:50:28,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:50:28,199 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:50:28,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:50:28,199 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:50:28,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:50:28,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:50:28,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:50:28,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:50:28,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:50:28,200 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:50:28,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:50:28,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:50:28,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:50:28,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:50:28,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:50:28,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:50:28,202 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_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f [2022-11-19 06:50:28,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:50:28,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:50:28,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:50:28,537 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:50:28,538 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:50:28,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-11-19 06:50:28,620 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/data/380307227/93a5d6795ade4852aa632eb6cbf2d62c/FLAGa0636594b [2022-11-19 06:50:29,195 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:50:29,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-11-19 06:50:29,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/data/380307227/93a5d6795ade4852aa632eb6cbf2d62c/FLAGa0636594b [2022-11-19 06:50:29,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/data/380307227/93a5d6795ade4852aa632eb6cbf2d62c [2022-11-19 06:50:29,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:50:29,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:50:29,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:50:29,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:50:29,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:50:29,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:29" (1/1) ... [2022-11-19 06:50:29,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559276ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:29, skipping insertion in model container [2022-11-19 06:50:29,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:50:29" (1/1) ... [2022-11-19 06:50:29,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:50:29,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:50:29,963 WARN L234 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_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2022-11-19 06:50:29,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:50:30,012 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:50:30,068 WARN L234 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_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2022-11-19 06:50:30,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:50:30,124 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:50:30,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30 WrapperNode [2022-11-19 06:50:30,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:50:30,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:50:30,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:50:30,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:50:30,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,188 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2022-11-19 06:50:30,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:50:30,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:50:30,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:50:30,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:50:30,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,237 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:50:30,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:50:30,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:50:30,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:50:30,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (1/1) ... [2022-11-19 06:50:30,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:50:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:30,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:50:30,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:50:30,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:50:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:50:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-19 06:50:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:50:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:50:30,315 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-19 06:50:30,315 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-19 06:50:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:50:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:50:30,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:50:30,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:50:30,318 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 06:50:30,539 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:50:30,553 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:50:30,817 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:50:30,825 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:50:30,825 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-19 06:50:30,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:50:30 BoogieIcfgContainer [2022-11-19 06:50:30,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:50:30,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:50:30,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:50:30,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:50:30,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:50:29" (1/3) ... [2022-11-19 06:50:30,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31746ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:50:30, skipping insertion in model container [2022-11-19 06:50:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:50:30" (2/3) ... [2022-11-19 06:50:30,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31746ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:50:30, skipping insertion in model container [2022-11-19 06:50:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:50:30" (3/3) ... [2022-11-19 06:50:30,850 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2022-11-19 06:50:30,858 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-19 06:50:30,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:50:30,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:50:30,874 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 06:50:30,959 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-19 06:50:31,003 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:50:31,023 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 148 transitions, 304 flow [2022-11-19 06:50:31,028 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 148 transitions, 304 flow [2022-11-19 06:50:31,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 148 transitions, 304 flow [2022-11-19 06:50:31,153 INFO L130 PetriNetUnfolder]: 26/224 cut-off events. [2022-11-19 06:50:31,158 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-19 06:50:31,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 224 events. 26/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 582 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-11-19 06:50:31,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2022-11-19 06:50:35,738 INFO L134 LiptonReduction]: Checked pairs total: 4942 [2022-11-19 06:50:35,738 INFO L136 LiptonReduction]: Total number of compositions: 141 [2022-11-19 06:50:35,746 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 36 transitions, 80 flow [2022-11-19 06:50:35,779 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 91 states, 87 states have (on average 2.6666666666666665) internal successors, (232), 90 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:35,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:50:35,805 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;@304f4e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:50:35,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-19 06:50:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 87 states have (on average 2.6666666666666665) internal successors, (232), 90 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:50:35,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:35,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:50:35,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash -723719230, now seen corresponding path program 1 times [2022-11-19 06:50:35,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849770838] [2022-11-19 06:50:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:36,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:36,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849770838] [2022-11-19 06:50:36,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849770838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:36,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:36,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:50:36,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780289645] [2022-11-19 06:50:36,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:36,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:36,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:36,261 INFO L87 Difference]: Start difference. First operand has 91 states, 87 states have (on average 2.6666666666666665) internal successors, (232), 90 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:50:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:36,350 INFO L93 Difference]: Finished difference Result 120 states and 216 transitions. [2022-11-19 06:50:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-19 06:50:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:36,361 INFO L225 Difference]: With dead ends: 120 [2022-11-19 06:50:36,362 INFO L226 Difference]: Without dead ends: 87 [2022-11-19 06:50:36,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:36,366 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:36,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:50:36,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-19 06:50:36,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-19 06:50:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.8452380952380953) internal successors, (155), 86 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 155 transitions. [2022-11-19 06:50:36,422 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 155 transitions. Word has length 6 [2022-11-19 06:50:36,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:36,422 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 155 transitions. [2022-11-19 06:50:36,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:50:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 155 transitions. [2022-11-19 06:50:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:50:36,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:36,426 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-19 06:50:36,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:50:36,427 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:50:36,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:36,427 INFO L85 PathProgramCache]: Analyzing trace with hash -723684247, now seen corresponding path program 1 times [2022-11-19 06:50:36,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:36,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896288386] [2022-11-19 06:50:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:36,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:50:36,455 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:50:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:50:36,483 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:50:36,483 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:50:36,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-19 06:50:36,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-19 06:50:36,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-19 06:50:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:50:36,489 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-19 06:50:36,492 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 06:50:36,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-19 06:50:36,524 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-19 06:50:36,527 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:50:36,527 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 172 transitions, 362 flow [2022-11-19 06:50:36,528 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 172 transitions, 362 flow [2022-11-19 06:50:36,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 172 transitions, 362 flow [2022-11-19 06:50:36,589 INFO L130 PetriNetUnfolder]: 43/349 cut-off events. [2022-11-19 06:50:36,589 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-19 06:50:36,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 349 events. 43/349 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1233 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 226. Up to 9 conditions per place. [2022-11-19 06:50:36,610 INFO L119 LiptonReduction]: Number of co-enabled transitions 8668 [2022-11-19 06:50:41,368 INFO L134 LiptonReduction]: Checked pairs total: 14433 [2022-11-19 06:50:41,369 INFO L136 LiptonReduction]: Total number of compositions: 165 [2022-11-19 06:50:41,370 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 47 transitions, 112 flow [2022-11-19 06:50:41,424 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 911 states, 893 states have (on average 3.5319148936170213) internal successors, (3154), 910 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:41,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:50:41,427 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;@304f4e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:50:41,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-19 06:50:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 893 states have (on average 3.5319148936170213) internal successors, (3154), 910 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:50:41,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:41,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:50:41,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 06:50:41,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:41,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1358710464, now seen corresponding path program 1 times [2022-11-19 06:50:41,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:41,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994353443] [2022-11-19 06:50:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:41,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:41,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:41,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994353443] [2022-11-19 06:50:41,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994353443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:41,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:41,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:50:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792460953] [2022-11-19 06:50:41,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:41,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:41,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:41,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:41,500 INFO L87 Difference]: Start difference. First operand has 911 states, 893 states have (on average 3.5319148936170213) internal successors, (3154), 910 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:50:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:41,626 INFO L93 Difference]: Finished difference Result 1324 states and 3357 transitions. [2022-11-19 06:50:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:41,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-19 06:50:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:41,637 INFO L225 Difference]: With dead ends: 1324 [2022-11-19 06:50:41,637 INFO L226 Difference]: Without dead ends: 1055 [2022-11-19 06:50:41,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:41,639 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:41,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:50:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-11-19 06:50:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 973. [2022-11-19 06:50:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 964 states have (on average 2.5850622406639006) internal successors, (2492), 972 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2492 transitions. [2022-11-19 06:50:41,734 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2492 transitions. Word has length 6 [2022-11-19 06:50:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:41,745 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 2492 transitions. [2022-11-19 06:50:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:50:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2492 transitions. [2022-11-19 06:50:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:50:41,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:41,746 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-19 06:50:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:50:41,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-19 06:50:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:41,747 INFO L85 PathProgramCache]: Analyzing trace with hash -2026433659, now seen corresponding path program 1 times [2022-11-19 06:50:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:41,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061976676] [2022-11-19 06:50:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:50:41,764 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:50:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:50:41,779 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:50:41,780 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:50:41,780 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-19 06:50:41,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-19 06:50:41,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-19 06:50:41,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-19 06:50:41,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:50:41,781 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-19 06:50:41,782 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 06:50:41,782 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-19 06:50:41,801 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 06:50:41,804 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:50:41,804 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 196 transitions, 422 flow [2022-11-19 06:50:41,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 196 transitions, 422 flow [2022-11-19 06:50:41,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2022-11-19 06:50:41,920 INFO L130 PetriNetUnfolder]: 65/507 cut-off events. [2022-11-19 06:50:41,920 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-19 06:50:41,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 507 events. 65/507 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2027 event pairs, 1 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 357. Up to 16 conditions per place. [2022-11-19 06:50:41,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 14652 [2022-11-19 06:50:46,775 INFO L134 LiptonReduction]: Checked pairs total: 24170 [2022-11-19 06:50:46,775 INFO L136 LiptonReduction]: Total number of compositions: 183 [2022-11-19 06:50:46,776 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 60 transitions, 150 flow [2022-11-19 06:50:47,161 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7306 states, 7262 states have (on average 4.973561002478656) internal successors, (36118), 7305 states have internal predecessors, (36118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:47,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:50:47,172 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;@304f4e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:50:47,172 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-19 06:50:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 7306 states, 7262 states have (on average 4.973561002478656) internal successors, (36118), 7305 states have internal predecessors, (36118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:50:47,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:47,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:50:47,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-19 06:50:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 396288783, now seen corresponding path program 1 times [2022-11-19 06:50:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:47,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388337416] [2022-11-19 06:50:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:47,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:47,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:47,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388337416] [2022-11-19 06:50:47,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388337416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:47,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:47,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:50:47,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452330555] [2022-11-19 06:50:47,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:47,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:47,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:47,355 INFO L87 Difference]: Start difference. First operand has 7306 states, 7262 states have (on average 4.973561002478656) internal successors, (36118), 7305 states have internal predecessors, (36118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:50:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:47,686 INFO L93 Difference]: Finished difference Result 11268 states and 36810 transitions. [2022-11-19 06:50:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-19 06:50:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:47,769 INFO L225 Difference]: With dead ends: 11268 [2022-11-19 06:50:47,769 INFO L226 Difference]: Without dead ends: 9219 [2022-11-19 06:50:47,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:47,770 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:47,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:50:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2022-11-19 06:50:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 8613. [2022-11-19 06:50:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8613 states, 8586 states have (on average 3.3067784765897974) internal successors, (28392), 8612 states have internal predecessors, (28392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8613 states to 8613 states and 28392 transitions. [2022-11-19 06:50:48,183 INFO L78 Accepts]: Start accepts. Automaton has 8613 states and 28392 transitions. Word has length 6 [2022-11-19 06:50:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:48,183 INFO L495 AbstractCegarLoop]: Abstraction has 8613 states and 28392 transitions. [2022-11-19 06:50:48,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:50:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8613 states and 28392 transitions. [2022-11-19 06:50:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:50:48,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:48,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:50:48,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:50:48,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-19 06:50:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash -531720197, now seen corresponding path program 1 times [2022-11-19 06:50:48,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:48,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369344326] [2022-11-19 06:50:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:48,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:48,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:48,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369344326] [2022-11-19 06:50:48,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369344326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:50:48,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940305440] [2022-11-19 06:50:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:48,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:50:48,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:50:48,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:50:48,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:50:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:50:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:50:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:48,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:50:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:48,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940305440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:50:48,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602702284] [2022-11-19 06:50:48,661 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:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:50:48,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:50:48,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:50:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372712459] [2022-11-19 06:50:48,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:50:48,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:50:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:50:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:50:48,666 INFO L87 Difference]: Start difference. First operand 8613 states and 28392 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:48,763 INFO L93 Difference]: Finished difference Result 1251 states and 3995 transitions. [2022-11-19 06:50:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:50:48,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 13 [2022-11-19 06:50:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:50:48,772 INFO L225 Difference]: With dead ends: 1251 [2022-11-19 06:50:48,773 INFO L226 Difference]: Without dead ends: 1251 [2022-11-19 06:50:48,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:50:48,774 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 82 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:50:48,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 13 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:50:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-11-19 06:50:48,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1251. [2022-11-19 06:50:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.196) internal successors, (3995), 1250 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3995 transitions. [2022-11-19 06:50:48,825 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3995 transitions. Word has length 13 [2022-11-19 06:50:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:50:48,825 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 3995 transitions. [2022-11-19 06:50:48,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:48,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3995 transitions. [2022-11-19 06:50:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:50:48,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:48,828 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-19 06:50:48,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:50:49,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:50:49,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-19 06:50:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1374377789, now seen corresponding path program 1 times [2022-11-19 06:50:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358601708] [2022-11-19 06:50:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:50:49,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:50:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:50:49,071 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:50:49,071 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:50:49,072 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-19 06:50:49,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-19 06:50:49,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-19 06:50:49,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-19 06:50:49,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-19 06:50:49,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:50:49,074 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-19 06:50:49,074 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 06:50:49,074 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-19 06:50:49,118 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-19 06:50:49,123 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:50:49,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 220 transitions, 484 flow [2022-11-19 06:50:49,124 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 220 transitions, 484 flow [2022-11-19 06:50:49,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 220 transitions, 484 flow [2022-11-19 06:50:49,283 INFO L130 PetriNetUnfolder]: 99/733 cut-off events. [2022-11-19 06:50:49,283 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-19 06:50:49,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 733 events. 99/733 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3265 event pairs, 6 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2022-11-19 06:50:49,310 INFO L119 LiptonReduction]: Number of co-enabled transitions 21736 [2022-11-19 06:50:54,324 INFO L134 LiptonReduction]: Checked pairs total: 36145 [2022-11-19 06:50:54,324 INFO L136 LiptonReduction]: Total number of compositions: 204 [2022-11-19 06:50:54,325 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 68 transitions, 180 flow [2022-11-19 06:50:57,585 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54211 states, 54079 states have (on average 5.747480537731836) internal successors, (310818), 54210 states have internal predecessors, (310818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:57,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:50:57,602 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;@304f4e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:50:57,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-19 06:50:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 54211 states, 54079 states have (on average 5.747480537731836) internal successors, (310818), 54210 states have internal predecessors, (310818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:50:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:50:57,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:50:57,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:50:57,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-19 06:50:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:50:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash 764054852, now seen corresponding path program 1 times [2022-11-19 06:50:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:50:57,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036131310] [2022-11-19 06:50:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:50:57,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:50:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:50:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:50:57,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:50:57,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036131310] [2022-11-19 06:50:57,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036131310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:50:57,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:50:57,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:50:57,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189692061] [2022-11-19 06:50:57,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:50:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:50:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:50:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:50:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:50:57,929 INFO L87 Difference]: Start difference. First operand has 54211 states, 54079 states have (on average 5.747480537731836) internal successors, (310818), 54210 states have internal predecessors, (310818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:50:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:50:59,577 INFO L93 Difference]: Finished difference Result 85624 states and 341511 transitions. [2022-11-19 06:50:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:50:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-19 06:50:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:00,536 INFO L225 Difference]: With dead ends: 85624 [2022-11-19 06:51:00,536 INFO L226 Difference]: Without dead ends: 73475 [2022-11-19 06:51:00,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:00,538 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:00,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 10 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:51:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73475 states. [2022-11-19 06:51:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73475 to 70039. [2022-11-19 06:51:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70039 states, 69958 states have (on average 4.010649246690872) internal successors, (280577), 70038 states have internal predecessors, (280577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70039 states to 70039 states and 280577 transitions. [2022-11-19 06:51:04,425 INFO L78 Accepts]: Start accepts. Automaton has 70039 states and 280577 transitions. Word has length 6 [2022-11-19 06:51:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:04,426 INFO L495 AbstractCegarLoop]: Abstraction has 70039 states and 280577 transitions. [2022-11-19 06:51:04,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-19 06:51:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 70039 states and 280577 transitions. [2022-11-19 06:51:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:51:04,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:04,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:04,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:51:04,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-19 06:51:04,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1091992848, now seen corresponding path program 1 times [2022-11-19 06:51:04,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:04,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140591448] [2022-11-19 06:51:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:04,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140591448] [2022-11-19 06:51:04,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140591448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:51:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388994449] [2022-11-19 06:51:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:04,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:51:04,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:51:04,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:51:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:04,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:51:04,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:51:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:04,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:51:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:04,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388994449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:51:04,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639940931] [2022-11-19 06:51:04,664 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:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-19 06:51:04,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:51:04,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:51:04,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231124997] [2022-11-19 06:51:04,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:51:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:51:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:51:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:51:04,668 INFO L87 Difference]: Start difference. First operand 70039 states and 280577 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:51:05,956 INFO L93 Difference]: Finished difference Result 64537 states and 261147 transitions. [2022-11-19 06:51:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:51:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 06:51:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:51:06,518 INFO L225 Difference]: With dead ends: 64537 [2022-11-19 06:51:06,519 INFO L226 Difference]: Without dead ends: 64537 [2022-11-19 06:51:06,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:51:06,520 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:51:06,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 30 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:51:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64537 states. [2022-11-19 06:51:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64537 to 64537. [2022-11-19 06:51:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64537 states, 64456 states have (on average 4.051554548839518) internal successors, (261147), 64536 states have internal predecessors, (261147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64537 states to 64537 states and 261147 transitions. [2022-11-19 06:51:09,544 INFO L78 Accepts]: Start accepts. Automaton has 64537 states and 261147 transitions. Word has length 13 [2022-11-19 06:51:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:51:09,545 INFO L495 AbstractCegarLoop]: Abstraction has 64537 states and 261147 transitions. [2022-11-19 06:51:09,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 64537 states and 261147 transitions. [2022-11-19 06:51:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 06:51:09,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:09,563 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 06:51:09,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:51:09,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6ae7d11-f330-42b7-ac65-3b16c5ee0ecc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:51:09,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-19 06:51:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1706208757, now seen corresponding path program 1 times [2022-11-19 06:51:09,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:09,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878503501] [2022-11-19 06:51:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:51:09,804 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:51:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:51:09,826 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:51:09,826 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:51:09,826 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-19 06:51:09,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-19 06:51:09,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-19 06:51:09,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-19 06:51:09,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-19 06:51:09,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-19 06:51:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:51:09,828 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-19 06:51:09,829 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-19 06:51:09,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-19 06:51:09,862 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-19 06:51:09,867 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 06:51:09,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 244 transitions, 548 flow [2022-11-19 06:51:09,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 244 transitions, 548 flow [2022-11-19 06:51:09,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 244 transitions, 548 flow [2022-11-19 06:51:10,122 INFO L130 PetriNetUnfolder]: 161/1099 cut-off events. [2022-11-19 06:51:10,122 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-19 06:51:10,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 1099 events. 161/1099 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5467 event pairs, 23 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 778. Up to 80 conditions per place. [2022-11-19 06:51:10,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 29920 [2022-11-19 06:51:16,318 INFO L134 LiptonReduction]: Checked pairs total: 55078 [2022-11-19 06:51:16,318 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-19 06:51:16,320 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 78 transitions, 216 flow [2022-11-19 06:51:34,653 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 401467 states, 401125 states have (on average 6.797818635088813) internal successors, (2726775), 401466 states have internal predecessors, (2726775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:34,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:51:34,654 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;@304f4e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:51:34,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-19 06:51:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand has 401467 states, 401125 states have (on average 6.797818635088813) internal successors, (2726775), 401466 states have internal predecessors, (2726775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:51:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:51:35,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:51:35,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:51:35,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-19 06:51:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:51:35,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1637914313, now seen corresponding path program 1 times [2022-11-19 06:51:35,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:51:35,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428381479] [2022-11-19 06:51:35,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:51:35,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:51:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:51:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:51:35,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:51:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428381479] [2022-11-19 06:51:35,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428381479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:51:35,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:51:35,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:51:35,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239334916] [2022-11-19 06:51:35,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:51:35,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:51:35,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:51:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:51:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:51:35,970 INFO L87 Difference]: Start difference. First operand has 401467 states, 401125 states have (on average 6.797818635088813) internal successors, (2726775), 401466 states have internal predecessors, (2726775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) 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)