./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- 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-5e519f3 [2022-11-02 20:13:32,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:13:32,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:13:32,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:13:32,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:13:32,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:13:32,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:13:32,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:13:32,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:13:32,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:13:32,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:13:32,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:13:32,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:13:32,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:13:32,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:13:32,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:13:32,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:13:32,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:13:32,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:13:32,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:13:32,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:13:32,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:13:32,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:13:32,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:13:32,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:13:32,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:13:32,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:13:32,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:13:32,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:13:32,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:13:32,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:13:32,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:13:32,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:13:32,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:13:32,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:13:32,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:13:32,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:13:32,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:13:32,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:13:32,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:13:32,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:13:32,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:13:32,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:13:32,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:13:32,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:13:32,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:13:32,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:13:32,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:13:32,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:13:32,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:13:32,230 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:13:32,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:13:32,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:13:32,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:13:32,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:13:32,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:13:32,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:13:32,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:13:32,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:13:32,233 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:13:32,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:13:32,233 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:13:32,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:13:32,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:13:32,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:13:32,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:13:32,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:32,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:13:32,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:13:32,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:13:32,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:13:32,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:13:32,237 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:13:32,237 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:13:32,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:13:32,237 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_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2022-11-02 20:13:32,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:13:32,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:13:32,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:13:32,540 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:13:32,541 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:13:32,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2022-11-02 20:13:32,622 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/data/9ed30abaa/6ceb84c5c51c442e86834c893b7ad22b/FLAG1998f0c62 [2022-11-02 20:13:33,313 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:13:33,318 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2022-11-02 20:13:33,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/data/9ed30abaa/6ceb84c5c51c442e86834c893b7ad22b/FLAG1998f0c62 [2022-11-02 20:13:33,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/data/9ed30abaa/6ceb84c5c51c442e86834c893b7ad22b [2022-11-02 20:13:33,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:13:33,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:13:33,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:33,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:13:33,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:13:33,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:33" (1/1) ... [2022-11-02 20:13:33,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc2ebd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:33, skipping insertion in model container [2022-11-02 20:13:33,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:13:33" (1/1) ... [2022-11-02 20:13:33,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:13:33,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:13:34,241 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i[47038,47051] [2022-11-02 20:13:34,263 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,264 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,264 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,265 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:34,319 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:13:34,352 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i[47038,47051] [2022-11-02 20:13:34,355 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,356 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,356 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,356 WARN L1543 CHandler]: Possible shadowing of function new [2022-11-02 20:13:34,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:13:34,432 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:13:34,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34 WrapperNode [2022-11-02 20:13:34,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:13:34,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:34,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:13:34,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:13:34,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,497 INFO L138 Inliner]: procedures = 278, calls = 64, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 300 [2022-11-02 20:13:34,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:13:34,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:13:34,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:13:34,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:13:34,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,558 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:13:34,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:13:34,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:13:34,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:13:34,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (1/1) ... [2022-11-02 20:13:34,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:13:34,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:34,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:13:34,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:13:34,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:13:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:13:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-02 20:13:34,656 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-02 20:13:34,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:13:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:13:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-02 20:13:34,657 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-02 20:13:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:13:34,657 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 20:13:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:13:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:13:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:13:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:13:34,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:13:34,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:13:34,661 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:13:34,817 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:13:34,819 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:13:35,518 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:13:35,528 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:13:35,528 INFO L300 CfgBuilder]: Removed 30 assume(true) statements. [2022-11-02 20:13:35,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:35 BoogieIcfgContainer [2022-11-02 20:13:35,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:13:35,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:13:35,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:13:35,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:13:35,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:13:33" (1/3) ... [2022-11-02 20:13:35,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eda11bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:35, skipping insertion in model container [2022-11-02 20:13:35,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:13:34" (2/3) ... [2022-11-02 20:13:35,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eda11bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:13:35, skipping insertion in model container [2022-11-02 20:13:35,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:13:35" (3/3) ... [2022-11-02 20:13:35,556 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2022-11-02 20:13:35,568 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:13:35,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:13:35,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:13:35,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:13:35,711 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 20:13:35,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 318 transitions, 658 flow [2022-11-02 20:13:35,953 INFO L130 PetriNetUnfolder]: 77/514 cut-off events. [2022-11-02 20:13:35,954 INFO L131 PetriNetUnfolder]: For 8/14 co-relation queries the response was YES. [2022-11-02 20:13:35,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 514 events. 77/514 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2398 event pairs, 0 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 261. Up to 8 conditions per place. [2022-11-02 20:13:35,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 318 transitions, 658 flow [2022-11-02 20:13:35,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 318 transitions, 658 flow [2022-11-02 20:13:35,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:13:35,991 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=PETRI_NET, 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;@34802e28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:13:35,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-02 20:13:36,008 INFO L130 PetriNetUnfolder]: 11/127 cut-off events. [2022-11-02 20:13:36,009 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 20:13:36,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:36,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:36,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:13:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:36,015 INFO L85 PathProgramCache]: Analyzing trace with hash -881864155, now seen corresponding path program 1 times [2022-11-02 20:13:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:36,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66595338] [2022-11-02 20:13:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:36,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:36,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66595338] [2022-11-02 20:13:36,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66595338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:36,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:36,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:13:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225804936] [2022-11-02 20:13:36,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:36,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:13:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:13:36,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:13:36,365 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 318 [2022-11-02 20:13:36,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 318 transitions, 658 flow. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:36,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:36,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 318 [2022-11-02 20:13:36,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:36,568 INFO L130 PetriNetUnfolder]: 20/503 cut-off events. [2022-11-02 20:13:36,569 INFO L131 PetriNetUnfolder]: For 33/41 co-relation queries the response was YES. [2022-11-02 20:13:36,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 503 events. 20/503 cut-off events. For 33/41 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2393 event pairs, 0 based on Foata normal form. 97/568 useless extension candidates. Maximal degree in co-relation 302. Up to 22 conditions per place. [2022-11-02 20:13:36,576 INFO L137 encePairwiseOnDemand]: 281/318 looper letters, 21 selfloop transitions, 2 changer transitions 0/289 dead transitions. [2022-11-02 20:13:36,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 289 transitions, 646 flow [2022-11-02 20:13:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:13:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:13:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 858 transitions. [2022-11-02 20:13:36,593 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.89937106918239 [2022-11-02 20:13:36,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 858 transitions. [2022-11-02 20:13:36,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 858 transitions. [2022-11-02 20:13:36,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:36,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 858 transitions. [2022-11-02 20:13:36,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:36,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:36,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:36,621 INFO L175 Difference]: Start difference. First operand has 277 places, 318 transitions, 658 flow. Second operand 3 states and 858 transitions. [2022-11-02 20:13:36,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 289 transitions, 646 flow [2022-11-02 20:13:36,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 289 transitions, 646 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:13:36,637 INFO L231 Difference]: Finished difference. Result has 278 places, 283 transitions, 598 flow [2022-11-02 20:13:36,639 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=598, PETRI_PLACES=278, PETRI_TRANSITIONS=283} [2022-11-02 20:13:36,646 INFO L287 CegarLoopForPetriNet]: 277 programPoint places, 1 predicate places. [2022-11-02 20:13:36,646 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 283 transitions, 598 flow [2022-11-02 20:13:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:36,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:36,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:36,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:13:36,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:13:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash -32979058, now seen corresponding path program 1 times [2022-11-02 20:13:36,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993847367] [2022-11-02 20:13:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:36,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:36,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:36,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993847367] [2022-11-02 20:13:36,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993847367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:13:36,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:13:36,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:13:36,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232656854] [2022-11-02 20:13:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:13:36,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:13:36,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:13:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:13:36,834 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 318 [2022-11-02 20:13:36,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 283 transitions, 598 flow. Second operand has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:36,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:36,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 318 [2022-11-02 20:13:36,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:37,019 INFO L130 PetriNetUnfolder]: 20/575 cut-off events. [2022-11-02 20:13:37,019 INFO L131 PetriNetUnfolder]: For 34/42 co-relation queries the response was YES. [2022-11-02 20:13:37,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 575 events. 20/575 cut-off events. For 34/42 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2490 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 503. Up to 25 conditions per place. [2022-11-02 20:13:37,025 INFO L137 encePairwiseOnDemand]: 315/318 looper letters, 15 selfloop transitions, 2 changer transitions 0/287 dead transitions. [2022-11-02 20:13:37,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 287 transitions, 640 flow [2022-11-02 20:13:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:13:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 20:13:37,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 825 transitions. [2022-11-02 20:13:37,028 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8647798742138365 [2022-11-02 20:13:37,029 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 825 transitions. [2022-11-02 20:13:37,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 825 transitions. [2022-11-02 20:13:37,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:37,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 825 transitions. [2022-11-02 20:13:37,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,036 INFO L175 Difference]: Start difference. First operand has 278 places, 283 transitions, 598 flow. Second operand 3 states and 825 transitions. [2022-11-02 20:13:37,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 287 transitions, 640 flow [2022-11-02 20:13:37,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 287 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:13:37,043 INFO L231 Difference]: Finished difference. Result has 280 places, 284 transitions, 608 flow [2022-11-02 20:13:37,044 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=608, PETRI_PLACES=280, PETRI_TRANSITIONS=284} [2022-11-02 20:13:37,044 INFO L287 CegarLoopForPetriNet]: 277 programPoint places, 3 predicate places. [2022-11-02 20:13:37,045 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 284 transitions, 608 flow [2022-11-02 20:13:37,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 270.3333333333333) internal successors, (811), 3 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:37,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:37,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:13:37,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:13:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1227432893, now seen corresponding path program 1 times [2022-11-02 20:13:37,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:37,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107129206] [2022-11-02 20:13:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:37,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:37,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434391175] [2022-11-02 20:13:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:37,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:37,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:13:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:13:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:37,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:37,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:37,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107129206] [2022-11-02 20:13:37,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:37,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434391175] [2022-11-02 20:13:37,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434391175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:37,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:37,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:13:37,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725749755] [2022-11-02 20:13:37,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:37,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:13:37,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:37,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:13:37,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:13:37,586 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 318 [2022-11-02 20:13:37,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 284 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:37,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 318 [2022-11-02 20:13:37,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:37,823 INFO L130 PetriNetUnfolder]: 20/653 cut-off events. [2022-11-02 20:13:37,824 INFO L131 PetriNetUnfolder]: For 39/47 co-relation queries the response was YES. [2022-11-02 20:13:37,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 653 events. 20/653 cut-off events. For 39/47 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2192 event pairs, 0 based on Foata normal form. 4/628 useless extension candidates. Maximal degree in co-relation 511. Up to 19 conditions per place. [2022-11-02 20:13:37,830 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 16 selfloop transitions, 9 changer transitions 0/294 dead transitions. [2022-11-02 20:13:37,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 294 transitions, 680 flow [2022-11-02 20:13:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:13:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:13:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2439 transitions. [2022-11-02 20:13:37,836 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8522012578616353 [2022-11-02 20:13:37,837 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2439 transitions. [2022-11-02 20:13:37,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2439 transitions. [2022-11-02 20:13:37,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:37,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2439 transitions. [2022-11-02 20:13:37,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,852 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,852 INFO L175 Difference]: Start difference. First operand has 280 places, 284 transitions, 608 flow. Second operand 9 states and 2439 transitions. [2022-11-02 20:13:37,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 294 transitions, 680 flow [2022-11-02 20:13:37,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 294 transitions, 678 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 20:13:37,859 INFO L231 Difference]: Finished difference. Result has 290 places, 290 transitions, 656 flow [2022-11-02 20:13:37,859 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=656, PETRI_PLACES=290, PETRI_TRANSITIONS=290} [2022-11-02 20:13:37,860 INFO L287 CegarLoopForPetriNet]: 277 programPoint places, 13 predicate places. [2022-11-02 20:13:37,860 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 290 transitions, 656 flow [2022-11-02 20:13:37,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:37,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:37,862 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:37,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:38,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:38,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:13:38,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:38,084 INFO L85 PathProgramCache]: Analyzing trace with hash -134988195, now seen corresponding path program 2 times [2022-11-02 20:13:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825393535] [2022-11-02 20:13:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:38,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:38,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644339124] [2022-11-02 20:13:38,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:13:38,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:38,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:38,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:38,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:13:38,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:13:38,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:13:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:38,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:13:39,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:39,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825393535] [2022-11-02 20:13:39,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:39,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644339124] [2022-11-02 20:13:39,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644339124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:39,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:39,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-02 20:13:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203384663] [2022-11-02 20:13:39,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:39,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:13:39,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:13:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:13:39,044 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 318 [2022-11-02 20:13:39,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 290 transitions, 656 flow. Second operand has 16 states, 16 states have (on average 270.25) internal successors, (4324), 16 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:39,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:39,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 318 [2022-11-02 20:13:39,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:39,569 INFO L130 PetriNetUnfolder]: 20/949 cut-off events. [2022-11-02 20:13:39,569 INFO L131 PetriNetUnfolder]: For 93/101 co-relation queries the response was YES. [2022-11-02 20:13:39,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 949 events. 20/949 cut-off events. For 93/101 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2221 event pairs, 0 based on Foata normal form. 8/928 useless extension candidates. Maximal degree in co-relation 918. Up to 22 conditions per place. [2022-11-02 20:13:39,575 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 24 selfloop transitions, 21 changer transitions 0/314 dead transitions. [2022-11-02 20:13:39,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 314 transitions, 854 flow [2022-11-02 20:13:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:13:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:13:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5677 transitions. [2022-11-02 20:13:39,587 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.850104821802935 [2022-11-02 20:13:39,587 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5677 transitions. [2022-11-02 20:13:39,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5677 transitions. [2022-11-02 20:13:39,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:39,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5677 transitions. [2022-11-02 20:13:39,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 270.3333333333333) internal successors, (5677), 21 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:39,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:39,618 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:39,619 INFO L175 Difference]: Start difference. First operand has 290 places, 290 transitions, 656 flow. Second operand 21 states and 5677 transitions. [2022-11-02 20:13:39,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 314 transitions, 854 flow [2022-11-02 20:13:39,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 314 transitions, 840 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:13:39,628 INFO L231 Difference]: Finished difference. Result has 314 places, 303 transitions, 780 flow [2022-11-02 20:13:39,628 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=780, PETRI_PLACES=314, PETRI_TRANSITIONS=303} [2022-11-02 20:13:39,629 INFO L287 CegarLoopForPetriNet]: 277 programPoint places, 37 predicate places. [2022-11-02 20:13:39,629 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 303 transitions, 780 flow [2022-11-02 20:13:39,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 270.25) internal successors, (4324), 16 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:39,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:39,632 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:39,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:39,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:39,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:13:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:39,856 INFO L85 PathProgramCache]: Analyzing trace with hash -491054179, now seen corresponding path program 3 times [2022-11-02 20:13:39,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:39,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511029500] [2022-11-02 20:13:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:39,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:39,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966710735] [2022-11-02 20:13:39,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:13:39,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:39,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:39,935 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:39,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:13:40,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:13:40,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:13:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-11-02 20:13:40,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-11-02 20:13:41,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:41,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511029500] [2022-11-02 20:13:41,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:41,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966710735] [2022-11-02 20:13:41,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966710735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:41,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:41,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:13:41,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892471963] [2022-11-02 20:13:41,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:41,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:13:41,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:13:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:13:41,114 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 318 [2022-11-02 20:13:41,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 303 transitions, 780 flow. Second operand has 8 states, 8 states have (on average 267.75) internal successors, (2142), 8 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:41,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:41,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 318 [2022-11-02 20:13:41,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:41,735 INFO L130 PetriNetUnfolder]: 21/1225 cut-off events. [2022-11-02 20:13:41,735 INFO L131 PetriNetUnfolder]: For 145/153 co-relation queries the response was YES. [2022-11-02 20:13:41,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1585 conditions, 1225 events. 21/1225 cut-off events. For 145/153 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1805 event pairs, 0 based on Foata normal form. 2/1198 useless extension candidates. Maximal degree in co-relation 1325. Up to 33 conditions per place. [2022-11-02 20:13:41,743 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 25 selfloop transitions, 9 changer transitions 0/319 dead transitions. [2022-11-02 20:13:41,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 319 transitions, 882 flow [2022-11-02 20:13:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:13:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:13:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2421 transitions. [2022-11-02 20:13:41,749 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8459119496855346 [2022-11-02 20:13:41,749 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2421 transitions. [2022-11-02 20:13:41,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2421 transitions. [2022-11-02 20:13:41,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:41,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2421 transitions. [2022-11-02 20:13:41,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 269.0) internal successors, (2421), 9 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:41,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:41,763 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 318.0) internal successors, (3180), 10 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:41,764 INFO L175 Difference]: Start difference. First operand has 314 places, 303 transitions, 780 flow. Second operand 9 states and 2421 transitions. [2022-11-02 20:13:41,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 319 transitions, 882 flow [2022-11-02 20:13:41,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 319 transitions, 858 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-02 20:13:41,775 INFO L231 Difference]: Finished difference. Result has 319 places, 309 transitions, 806 flow [2022-11-02 20:13:41,776 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=806, PETRI_PLACES=319, PETRI_TRANSITIONS=309} [2022-11-02 20:13:41,780 INFO L287 CegarLoopForPetriNet]: 277 programPoint places, 42 predicate places. [2022-11-02 20:13:41,780 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 309 transitions, 806 flow [2022-11-02 20:13:41,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 267.75) internal successors, (2142), 8 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:41,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:41,790 INFO L208 CegarLoopForPetriNet]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:41,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:42,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:42,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:13:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1090462563, now seen corresponding path program 4 times [2022-11-02 20:13:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105657380] [2022-11-02 20:13:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:42,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:42,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:42,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125265021] [2022-11-02 20:13:42,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:13:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:42,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:42,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:13:43,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:13:43,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 3372 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:13:43,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-11-02 20:13:44,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7883 backedges. 0 proven. 5526 refuted. 0 times theorem prover too weak. 2357 trivial. 0 not checked. [2022-11-02 20:13:46,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:46,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105657380] [2022-11-02 20:13:46,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:13:46,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125265021] [2022-11-02 20:13:46,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125265021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:46,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:46,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-02 20:13:46,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978859267] [2022-11-02 20:13:46,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:46,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:13:46,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:13:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:13:46,067 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 318 [2022-11-02 20:13:46,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 309 transitions, 806 flow. Second operand has 16 states, 16 states have (on average 268.375) internal successors, (4294), 16 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:46,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:13:46,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 318 [2022-11-02 20:13:46,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:13:47,676 INFO L130 PetriNetUnfolder]: 25/2321 cut-off events. [2022-11-02 20:13:47,676 INFO L131 PetriNetUnfolder]: For 378/386 co-relation queries the response was YES. [2022-11-02 20:13:47,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 2321 events. 25/2321 cut-off events. For 378/386 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1788 event pairs, 0 based on Foata normal form. 4/2296 useless extension candidates. Maximal degree in co-relation 2797. Up to 70 conditions per place. [2022-11-02 20:13:47,687 INFO L137 encePairwiseOnDemand]: 312/318 looper letters, 45 selfloop transitions, 21 changer transitions 0/351 dead transitions. [2022-11-02 20:13:47,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 351 transitions, 1082 flow [2022-11-02 20:13:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:13:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 20:13:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5635 transitions. [2022-11-02 20:13:47,700 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8438155136268344 [2022-11-02 20:13:47,700 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5635 transitions. [2022-11-02 20:13:47,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5635 transitions. [2022-11-02 20:13:47,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:13:47,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5635 transitions. [2022-11-02 20:13:47,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 268.3333333333333) internal successors, (5635), 21 states have internal predecessors, (5635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:47,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:47,732 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 318.0) internal successors, (6996), 22 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:47,733 INFO L175 Difference]: Start difference. First operand has 319 places, 309 transitions, 806 flow. Second operand 21 states and 5635 transitions. [2022-11-02 20:13:47,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 351 transitions, 1082 flow [2022-11-02 20:13:47,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 351 transitions, 1068 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 20:13:47,742 INFO L231 Difference]: Finished difference. Result has 343 places, 322 transitions, 930 flow [2022-11-02 20:13:47,743 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=318, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=930, PETRI_PLACES=343, PETRI_TRANSITIONS=322} [2022-11-02 20:13:47,743 INFO L287 CegarLoopForPetriNet]: 277 programPoint places, 66 predicate places. [2022-11-02 20:13:47,744 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 322 transitions, 930 flow [2022-11-02 20:13:47,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 268.375) internal successors, (4294), 16 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:13:47,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:13:47,746 INFO L208 CegarLoopForPetriNet]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:47,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-02 20:13:47,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:47,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-02 20:13:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:47,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1395941731, now seen corresponding path program 5 times [2022-11-02 20:13:47,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:47,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914837645] [2022-11-02 20:13:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:47,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:48,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:13:48,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075906231] [2022-11-02 20:13:48,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:13:48,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:48,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:48,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:48,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c475966-c81d-42cb-85ac-60da7f4f095f/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process