./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN --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 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc --- 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-6b4ec56 [2022-11-20 11:55:40,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:55:40,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:55:40,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:55:40,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:55:40,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:55:40,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:55:40,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:55:40,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:55:40,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:55:40,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:55:40,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:55:40,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:55:40,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:55:40,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:55:40,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:55:40,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:55:40,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:55:40,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:55:40,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:55:40,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:55:40,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:55:40,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:55:40,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:55:40,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:55:40,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:55:40,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:55:40,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:55:40,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:55:40,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:55:40,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:55:40,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:55:40,459 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:55:40,460 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:55:40,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:55:40,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:55:40,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:55:40,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:55:40,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:55:40,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:55:40,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:55:40,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:55:40,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:55:40,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:55:40,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:55:40,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:55:40,491 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:55:40,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:55:40,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:55:40,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:55:40,493 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:55:40,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:55:40,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:55:40,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:55:40,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:55:40,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:55:40,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:55:40,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:55:40,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:55:40,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:55:40,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:55:40,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:55:40,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:55:40,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:55:40,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:55:40,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:55:40,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:55:40,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:55:40,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:55:40,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:55:40,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:55:40,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:55:40,498 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:55:40,498 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:55:40,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:55:40,498 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_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ac72ff2379990464c5f55660be1e08b12557a61aceeef8401296ef66be035fc [2022-11-20 11:55:40,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:55:40,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:55:40,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:55:40,787 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:55:40,787 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:55:40,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2022-11-20 11:55:44,001 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:55:44,321 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:55:44,321 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i [2022-11-20 11:55:44,340 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/data/58236b663/b630028a533646caa6f7ab734d4852e0/FLAG1e4913683 [2022-11-20 11:55:44,359 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/data/58236b663/b630028a533646caa6f7ab734d4852e0 [2022-11-20 11:55:44,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:55:44,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:55:44,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:55:44,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:55:44,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:55:44,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:55:44" (1/1) ... [2022-11-20 11:55:44,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e0d20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:44, skipping insertion in model container [2022-11-20 11:55:44,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:55:44" (1/1) ... [2022-11-20 11:55:44,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:55:44,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:55:44,948 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2022-11-20 11:55:44,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:55:44,999 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:55:45,039 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/sv-benchmarks/c/goblint-regression/28-race_reach_79-equ_racefree.i[47038,47051] [2022-11-20 11:55:45,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:55:45,111 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:55:45,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45 WrapperNode [2022-11-20 11:55:45,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:55:45,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:55:45,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:55:45,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:55:45,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,167 INFO L138 Inliner]: procedures = 271, calls = 56, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 201 [2022-11-20 11:55:45,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:55:45,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:55:45,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:55:45,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:55:45,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,204 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:55:45,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:55:45,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:55:45,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:55:45,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (1/1) ... [2022-11-20 11:55:45,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:55:45,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:45,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:55:45,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cbdb54b-57a1-4d61-bdab-9489dfe18203/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:55:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:55:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:55:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:55:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:55:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:55:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:55:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 11:55:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 11:55:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:55:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:55:45,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:55:45,341 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:55:45,502 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:55:45,516 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:55:45,905 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:55:45,913 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:55:45,913 INFO L300 CfgBuilder]: Removed 22 assume(true) statements. [2022-11-20 11:55:45,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:55:45 BoogieIcfgContainer [2022-11-20 11:55:45,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:55:45,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:55:45,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:55:45,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:55:45,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:55:44" (1/3) ... [2022-11-20 11:55:45,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6708aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:55:45, skipping insertion in model container [2022-11-20 11:55:45,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:45" (2/3) ... [2022-11-20 11:55:45,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6708aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:55:45, skipping insertion in model container [2022-11-20 11:55:45,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:55:45" (3/3) ... [2022-11-20 11:55:45,925 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2022-11-20 11:55:45,934 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:55:45,945 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:55:45,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 11:55:45,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:55:46,025 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 11:55:46,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 206 transitions, 420 flow [2022-11-20 11:55:46,167 INFO L130 PetriNetUnfolder]: 43/278 cut-off events. [2022-11-20 11:55:46,168 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:55:46,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 278 events. 43/278 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 860 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2022-11-20 11:55:46,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 206 transitions, 420 flow [2022-11-20 11:55:46,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 199 transitions, 403 flow [2022-11-20 11:55:46,217 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:55:46,225 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;@68c3efa4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:55:46,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 11:55:46,290 INFO L130 PetriNetUnfolder]: 14/162 cut-off events. [2022-11-20 11:55:46,290 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:55:46,291 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:46,291 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:46,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:55:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash 682234352, now seen corresponding path program 1 times [2022-11-20 11:55:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:46,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688648555] [2022-11-20 11:55:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:46,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:46,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688648555] [2022-11-20 11:55:46,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688648555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:46,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:46,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:55:46,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836467308] [2022-11-20 11:55:46,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:46,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:55:46,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:55:46,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:55:46,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 206 [2022-11-20 11:55:46,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 199 transitions, 403 flow. Second operand has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 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) [2022-11-20 11:55:46,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:46,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 206 [2022-11-20 11:55:46,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:55:46,759 INFO L130 PetriNetUnfolder]: 4/231 cut-off events. [2022-11-20 11:55:46,759 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:55:46,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 231 events. 4/231 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 623 event pairs, 0 based on Foata normal form. 37/257 useless extension candidates. Maximal degree in co-relation 120. Up to 4 conditions per place. [2022-11-20 11:55:46,768 INFO L137 encePairwiseOnDemand]: 182/206 looper letters, 1 selfloop transitions, 0 changer transitions 0/173 dead transitions. [2022-11-20 11:55:46,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 173 transitions, 353 flow [2022-11-20 11:55:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:55:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:55:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 381 transitions. [2022-11-20 11:55:46,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9247572815533981 [2022-11-20 11:55:46,786 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 381 transitions. [2022-11-20 11:55:46,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 381 transitions. [2022-11-20 11:55:46,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:55:46,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 381 transitions. [2022-11-20 11:55:46,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 190.5) internal successors, (381), 2 states have internal predecessors, (381), 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) [2022-11-20 11:55:46,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 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) [2022-11-20 11:55:46,801 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 206.0) internal successors, (618), 3 states have internal predecessors, (618), 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) [2022-11-20 11:55:46,803 INFO L175 Difference]: Start difference. First operand has 175 places, 199 transitions, 403 flow. Second operand 2 states and 381 transitions. [2022-11-20 11:55:46,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 173 transitions, 353 flow [2022-11-20 11:55:46,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 353 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:55:46,811 INFO L231 Difference]: Finished difference. Result has 174 places, 173 transitions, 351 flow [2022-11-20 11:55:46,814 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=351, PETRI_PLACES=174, PETRI_TRANSITIONS=173} [2022-11-20 11:55:46,820 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, -1 predicate places. [2022-11-20 11:55:46,820 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 173 transitions, 351 flow [2022-11-20 11:55:46,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 178.5) internal successors, (357), 2 states have internal predecessors, (357), 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) [2022-11-20 11:55:46,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:46,821 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:46,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:55:46,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:55:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2105181135, now seen corresponding path program 1 times [2022-11-20 11:55:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:46,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747653519] [2022-11-20 11:55:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:46,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:47,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:47,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747653519] [2022-11-20 11:55:47,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747653519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:47,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:47,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230114789] [2022-11-20 11:55:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:47,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 206 [2022-11-20 11:55:47,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 173 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-11-20 11:55:47,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:47,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 206 [2022-11-20 11:55:47,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:55:47,204 INFO L130 PetriNetUnfolder]: 3/177 cut-off events. [2022-11-20 11:55:47,204 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:55:47,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 177 events. 3/177 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 295 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 190. Up to 6 conditions per place. [2022-11-20 11:55:47,212 INFO L137 encePairwiseOnDemand]: 203/206 looper letters, 8 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2022-11-20 11:55:47,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 175 transitions, 375 flow [2022-11-20 11:55:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:55:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-11-20 11:55:47,217 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8478964401294499 [2022-11-20 11:55:47,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-11-20 11:55:47,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-11-20 11:55:47,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:55:47,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-11-20 11:55:47,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2022-11-20 11:55:47,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 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) [2022-11-20 11:55:47,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 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) [2022-11-20 11:55:47,227 INFO L175 Difference]: Start difference. First operand has 174 places, 173 transitions, 351 flow. Second operand 3 states and 524 transitions. [2022-11-20 11:55:47,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 175 transitions, 375 flow [2022-11-20 11:55:47,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 175 transitions, 375 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:55:47,234 INFO L231 Difference]: Finished difference. Result has 177 places, 173 transitions, 359 flow [2022-11-20 11:55:47,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=359, PETRI_PLACES=177, PETRI_TRANSITIONS=173} [2022-11-20 11:55:47,236 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 2 predicate places. [2022-11-20 11:55:47,236 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 173 transitions, 359 flow [2022-11-20 11:55:47,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 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) [2022-11-20 11:55:47,236 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:47,237 INFO L209 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] [2022-11-20 11:55:47,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:55:47,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 11:55:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash 758021973, now seen corresponding path program 1 times [2022-11-20 11:55:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:47,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179225502] [2022-11-20 11:55:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:47,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:55:47,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:55:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:55:47,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:55:47,403 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:55:47,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 11:55:47,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 11:55:47,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-20 11:55:47,408 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 11:55:47,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:55:47,408 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 11:55:47,412 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:55:47,413 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:55:47,457 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:55:47,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 266 transitions, 550 flow [2022-11-20 11:55:47,606 INFO L130 PetriNetUnfolder]: 72/435 cut-off events. [2022-11-20 11:55:47,606 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:55:47,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 435 events. 72/435 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1664 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 280. Up to 12 conditions per place. [2022-11-20 11:55:47,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 266 transitions, 550 flow [2022-11-20 11:55:47,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 264 transitions, 546 flow [2022-11-20 11:55:47,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:55:47,630 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;@68c3efa4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:55:47,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 11:55:47,650 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2022-11-20 11:55:47,650 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:55:47,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:47,651 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:47,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:55:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash -631775504, now seen corresponding path program 1 times [2022-11-20 11:55:47,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:47,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713900752] [2022-11-20 11:55:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:47,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:47,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:47,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713900752] [2022-11-20 11:55:47,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713900752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:47,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:47,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:55:47,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179239939] [2022-11-20 11:55:47,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:47,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:55:47,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:47,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:55:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:55:47,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 266 [2022-11-20 11:55:47,702 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 546 flow. Second operand has 2 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 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) [2022-11-20 11:55:47,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:47,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 266 [2022-11-20 11:55:47,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:55:47,777 INFO L130 PetriNetUnfolder]: 9/366 cut-off events. [2022-11-20 11:55:47,777 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 11:55:47,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 366 events. 9/366 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1346 event pairs, 0 based on Foata normal form. 88/436 useless extension candidates. Maximal degree in co-relation 240. Up to 7 conditions per place. [2022-11-20 11:55:47,781 INFO L137 encePairwiseOnDemand]: 231/266 looper letters, 4 selfloop transitions, 0 changer transitions 0/226 dead transitions. [2022-11-20 11:55:47,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 226 transitions, 478 flow [2022-11-20 11:55:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:55:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:55:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 487 transitions. [2022-11-20 11:55:47,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9154135338345865 [2022-11-20 11:55:47,784 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 487 transitions. [2022-11-20 11:55:47,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 487 transitions. [2022-11-20 11:55:47,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:55:47,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 487 transitions. [2022-11-20 11:55:47,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 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) [2022-11-20 11:55:47,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 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) [2022-11-20 11:55:47,789 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 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) [2022-11-20 11:55:47,789 INFO L175 Difference]: Start difference. First operand has 228 places, 264 transitions, 546 flow. Second operand 2 states and 487 transitions. [2022-11-20 11:55:47,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 226 transitions, 478 flow [2022-11-20 11:55:47,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 226 transitions, 478 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:55:47,794 INFO L231 Difference]: Finished difference. Result has 226 places, 226 transitions, 470 flow [2022-11-20 11:55:47,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=470, PETRI_PLACES=226, PETRI_TRANSITIONS=226} [2022-11-20 11:55:47,796 INFO L288 CegarLoopForPetriNet]: 228 programPoint places, -2 predicate places. [2022-11-20 11:55:47,796 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 226 transitions, 470 flow [2022-11-20 11:55:47,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 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) [2022-11-20 11:55:47,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:47,797 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:47,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:55:47,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:55:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:47,798 INFO L85 PathProgramCache]: Analyzing trace with hash 875776305, now seen corresponding path program 1 times [2022-11-20 11:55:47,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:47,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031241609] [2022-11-20 11:55:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:47,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:47,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:47,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031241609] [2022-11-20 11:55:47,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031241609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:47,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:47,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:47,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174995176] [2022-11-20 11:55:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:47,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:47,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 266 [2022-11-20 11:55:47,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 226 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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) [2022-11-20 11:55:47,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:47,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 266 [2022-11-20 11:55:47,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:55:47,987 INFO L130 PetriNetUnfolder]: 7/321 cut-off events. [2022-11-20 11:55:47,987 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-20 11:55:47,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 321 events. 7/321 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1021 event pairs, 0 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 352. Up to 16 conditions per place. [2022-11-20 11:55:47,992 INFO L137 encePairwiseOnDemand]: 263/266 looper letters, 13 selfloop transitions, 2 changer transitions 0/230 dead transitions. [2022-11-20 11:55:47,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 230 transitions, 508 flow [2022-11-20 11:55:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:55:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2022-11-20 11:55:47,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8358395989974937 [2022-11-20 11:55:47,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2022-11-20 11:55:47,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2022-11-20 11:55:47,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:55:47,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2022-11-20 11:55:47,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 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) [2022-11-20 11:55:48,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 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) [2022-11-20 11:55:48,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 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) [2022-11-20 11:55:48,001 INFO L175 Difference]: Start difference. First operand has 226 places, 226 transitions, 470 flow. Second operand 3 states and 667 transitions. [2022-11-20 11:55:48,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 230 transitions, 508 flow [2022-11-20 11:55:48,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 230 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:55:48,007 INFO L231 Difference]: Finished difference. Result has 229 places, 227 transitions, 482 flow [2022-11-20 11:55:48,007 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=482, PETRI_PLACES=229, PETRI_TRANSITIONS=227} [2022-11-20 11:55:48,008 INFO L288 CegarLoopForPetriNet]: 228 programPoint places, 1 predicate places. [2022-11-20 11:55:48,008 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 227 transitions, 482 flow [2022-11-20 11:55:48,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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) [2022-11-20 11:55:48,009 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:48,031 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:48,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:55:48,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:55:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 524199786, now seen corresponding path program 1 times [2022-11-20 11:55:48,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:48,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997055876] [2022-11-20 11:55:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:48,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:48,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:48,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997055876] [2022-11-20 11:55:48,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997055876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:48,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:48,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 11:55:48,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176838350] [2022-11-20 11:55:48,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:48,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:55:48,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:48,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:55:48,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:55:48,971 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 266 [2022-11-20 11:55:48,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 227 transitions, 482 flow. Second operand has 12 states, 12 states have (on average 145.66666666666666) internal successors, (1748), 12 states have internal predecessors, (1748), 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) [2022-11-20 11:55:48,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:48,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 266 [2022-11-20 11:55:48,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:55:56,175 INFO L130 PetriNetUnfolder]: 13877/34744 cut-off events. [2022-11-20 11:55:56,175 INFO L131 PetriNetUnfolder]: For 312/312 co-relation queries the response was YES. [2022-11-20 11:55:56,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56523 conditions, 34744 events. 13877/34744 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 1332. Compared 421976 event pairs, 3273 based on Foata normal form. 0/33542 useless extension candidates. Maximal degree in co-relation 56516. Up to 9611 conditions per place. [2022-11-20 11:55:56,409 INFO L137 encePairwiseOnDemand]: 250/266 looper letters, 347 selfloop transitions, 45 changer transitions 127/660 dead transitions. [2022-11-20 11:55:56,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 660 transitions, 2450 flow [2022-11-20 11:55:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:55:56,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-20 11:55:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4073 transitions. [2022-11-20 11:55:56,422 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6124812030075188 [2022-11-20 11:55:56,422 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4073 transitions. [2022-11-20 11:55:56,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4073 transitions. [2022-11-20 11:55:56,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:55:56,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4073 transitions. [2022-11-20 11:55:56,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 162.92) internal successors, (4073), 25 states have internal predecessors, (4073), 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) [2022-11-20 11:55:56,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 266.0) internal successors, (6916), 26 states have internal predecessors, (6916), 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) [2022-11-20 11:55:56,458 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 266.0) internal successors, (6916), 26 states have internal predecessors, (6916), 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) [2022-11-20 11:55:56,458 INFO L175 Difference]: Start difference. First operand has 229 places, 227 transitions, 482 flow. Second operand 25 states and 4073 transitions. [2022-11-20 11:55:56,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 660 transitions, 2450 flow [2022-11-20 11:55:56,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 660 transitions, 2448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:55:56,476 INFO L231 Difference]: Finished difference. Result has 263 places, 275 transitions, 779 flow [2022-11-20 11:55:56,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=779, PETRI_PLACES=263, PETRI_TRANSITIONS=275} [2022-11-20 11:55:56,482 INFO L288 CegarLoopForPetriNet]: 228 programPoint places, 35 predicate places. [2022-11-20 11:55:56,482 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 275 transitions, 779 flow [2022-11-20 11:55:56,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 145.66666666666666) internal successors, (1748), 12 states have internal predecessors, (1748), 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) [2022-11-20 11:55:56,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:56,485 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-11-20 11:55:56,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:55:56,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 11:55:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1589778799, now seen corresponding path program 1 times [2022-11-20 11:55:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:56,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447140054] [2022-11-20 11:55:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:55:56,522 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:55:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:55:56,558 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:55:56,559 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:55:56,560 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 11:55:56,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 11:55:56,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 11:55:56,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 11:55:56,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 11:55:56,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:55:56,561 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 11:55:56,562 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:55:56,562 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:55:56,619 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:55:56,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 278 places, 326 transitions, 682 flow [2022-11-20 11:55:56,757 INFO L130 PetriNetUnfolder]: 106/625 cut-off events. [2022-11-20 11:55:56,758 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 11:55:56,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 625 events. 106/625 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2628 event pairs, 1 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 443. Up to 16 conditions per place. [2022-11-20 11:55:56,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 278 places, 326 transitions, 682 flow [2022-11-20 11:55:56,779 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 324 transitions, 678 flow [2022-11-20 11:55:56,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:55:56,786 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;@68c3efa4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:55:56,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 11:55:56,806 INFO L130 PetriNetUnfolder]: 16/173 cut-off events. [2022-11-20 11:55:56,806 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:55:56,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:56,807 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:56,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:55:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash 438139376, now seen corresponding path program 1 times [2022-11-20 11:55:56,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:56,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124818681] [2022-11-20 11:55:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:56,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:56,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:56,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124818681] [2022-11-20 11:55:56,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124818681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:56,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:56,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:55:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787769753] [2022-11-20 11:55:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:56,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:55:56,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:55:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:55:56,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 326 [2022-11-20 11:55:56,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 324 transitions, 678 flow. Second operand has 2 states, 2 states have (on average 270.5) internal successors, (541), 2 states have internal predecessors, (541), 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) [2022-11-20 11:55:56,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:56,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 326 [2022-11-20 11:55:56,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:55:56,989 INFO L130 PetriNetUnfolder]: 16/527 cut-off events. [2022-11-20 11:55:56,989 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 11:55:56,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 527 events. 16/527 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2255 event pairs, 1 based on Foata normal form. 205/705 useless extension candidates. Maximal degree in co-relation 380. Up to 16 conditions per place. [2022-11-20 11:55:56,999 INFO L137 encePairwiseOnDemand]: 280/326 looper letters, 6 selfloop transitions, 0 changer transitions 0/274 dead transitions. [2022-11-20 11:55:56,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 274 transitions, 590 flow [2022-11-20 11:55:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:55:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:55:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 592 transitions. [2022-11-20 11:55:57,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9079754601226994 [2022-11-20 11:55:57,005 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 592 transitions. [2022-11-20 11:55:57,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 592 transitions. [2022-11-20 11:55:57,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:55:57,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 592 transitions. [2022-11-20 11:55:57,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 296.0) internal successors, (592), 2 states have internal predecessors, (592), 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) [2022-11-20 11:55:57,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 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) [2022-11-20 11:55:57,011 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 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) [2022-11-20 11:55:57,011 INFO L175 Difference]: Start difference. First operand has 277 places, 324 transitions, 678 flow. Second operand 2 states and 592 transitions. [2022-11-20 11:55:57,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 274 transitions, 590 flow [2022-11-20 11:55:57,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 274 transitions, 590 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:55:57,019 INFO L231 Difference]: Finished difference. Result has 274 places, 274 transitions, 578 flow [2022-11-20 11:55:57,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=578, PETRI_PLACES=274, PETRI_TRANSITIONS=274} [2022-11-20 11:55:57,021 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, -3 predicate places. [2022-11-20 11:55:57,022 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 274 transitions, 578 flow [2022-11-20 11:55:57,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 270.5) internal successors, (541), 2 states have internal predecessors, (541), 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) [2022-11-20 11:55:57,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:57,023 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:57,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:55:57,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:55:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1945691185, now seen corresponding path program 1 times [2022-11-20 11:55:57,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:57,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664663693] [2022-11-20 11:55:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:57,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:57,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664663693] [2022-11-20 11:55:57,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664663693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:57,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:57,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:57,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383546527] [2022-11-20 11:55:57,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:57,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:57,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:57,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:57,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:57,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 326 [2022-11-20 11:55:57,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 274 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 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) [2022-11-20 11:55:57,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:57,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 326 [2022-11-20 11:55:57,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:55:57,295 INFO L130 PetriNetUnfolder]: 14/482 cut-off events. [2022-11-20 11:55:57,295 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-20 11:55:57,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 482 events. 14/482 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1934 event pairs, 1 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 540. Up to 30 conditions per place. [2022-11-20 11:55:57,302 INFO L137 encePairwiseOnDemand]: 323/326 looper letters, 15 selfloop transitions, 2 changer transitions 0/278 dead transitions. [2022-11-20 11:55:57,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 278 transitions, 620 flow [2022-11-20 11:55:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:55:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 807 transitions. [2022-11-20 11:55:57,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8251533742331288 [2022-11-20 11:55:57,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 807 transitions. [2022-11-20 11:55:57,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 807 transitions. [2022-11-20 11:55:57,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:55:57,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 807 transitions. [2022-11-20 11:55:57,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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) [2022-11-20 11:55:57,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 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) [2022-11-20 11:55:57,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 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) [2022-11-20 11:55:57,310 INFO L175 Difference]: Start difference. First operand has 274 places, 274 transitions, 578 flow. Second operand 3 states and 807 transitions. [2022-11-20 11:55:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 278 transitions, 620 flow [2022-11-20 11:55:57,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 278 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:55:57,316 INFO L231 Difference]: Finished difference. Result has 277 places, 275 transitions, 590 flow [2022-11-20 11:55:57,316 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=326, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=590, PETRI_PLACES=277, PETRI_TRANSITIONS=275} [2022-11-20 11:55:57,318 INFO L288 CegarLoopForPetriNet]: 277 programPoint places, 0 predicate places. [2022-11-20 11:55:57,318 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 275 transitions, 590 flow [2022-11-20 11:55:57,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 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) [2022-11-20 11:55:57,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:55:57,319 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 11:55:57,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:55:57,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 11:55:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1844685738, now seen corresponding path program 1 times [2022-11-20 11:55:57,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:57,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208305107] [2022-11-20 11:55:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:57,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:57,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208305107] [2022-11-20 11:55:57,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208305107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:57,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:57,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 11:55:57,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718614877] [2022-11-20 11:55:57,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:55:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:55:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:55:57,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 326 [2022-11-20 11:55:57,891 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 275 transitions, 590 flow. Second operand has 12 states, 12 states have (on average 178.66666666666666) internal successors, (2144), 12 states have internal predecessors, (2144), 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) [2022-11-20 11:55:57,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:55:57,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 326 [2022-11-20 11:55:57,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand